diff --git a/src/speedtestutil.cpp b/src/speedtestutil.cpp
index 09d8e74..7adc616 100644
--- a/src/speedtestutil.cpp
+++ b/src/speedtestutil.cpp
@@ -74,15 +74,14 @@ void explodeVmess(std::string vmess, const std::string &custom_port, nodeInfo &n
 
     GetMember(jsondata, "ps", ps);
     GetMember(jsondata, "add", add);
+    port = custom_port.size() ? custom_port : GetMember(jsondata, "port");
+    if(port == "0")
+        return;
     GetMember(jsondata, "type", type);
     GetMember(jsondata, "id", id);
     GetMember(jsondata, "aid", aid);
     GetMember(jsondata, "net", net);
     GetMember(jsondata, "tls", tls);
-    if(custom_port.size())
-        port = custom_port;
-    else
-        GetMember(jsondata, "port", port);
 
     GetMember(jsondata, "host", host);
     switch(to_int(version))
@@ -107,7 +106,7 @@ void explodeVmess(std::string vmess, const std::string &custom_port, nodeInfo &n
     node.group = V2RAY_DEFAULT_GROUP;
     node.remarks = ps;
     node.server = add;
-    node.port = to_int(port, 0);
+    node.port = to_int(port, 1);
     node.proxyStr = vmessConstruct(add, port, type, id, aid, net, "auto", path, host, "", tls);
 }
 
@@ -137,7 +136,9 @@ void explodeVmessConf(std::string content, const std::string &custom_port, bool
             {
                 nodejson = json["outbounds"][0];
                 add = GetMember(nodejson["settings"]["vnext"][0], "address");
-                port = GetMember(nodejson["settings"]["vnext"][0], "port");
+                port = custom_port.size() ? custom_port : GetMember(nodejson["settings"]["vnext"][0], "port");
+                if(port == "0")
+                    return;
                 if(nodejson["settings"]["vnext"][0]["users"].Size())
                 {
                     id = GetMember(nodejson["settings"]["vnext"][0]["users"][0], "id");
@@ -188,7 +189,7 @@ void explodeVmessConf(std::string content, const std::string &custom_port, bool
                 node.group = V2RAY_DEFAULT_GROUP;
                 node.remarks = add + ":" + port;
                 node.server = add;
-                node.port = to_int(port);
+                node.port = to_int(port, 1);
                 nodes.push_back(node);
             }
             return;
@@ -212,10 +213,9 @@ void explodeVmessConf(std::string content, const std::string &custom_port, bool
         //common info
         json["vmess"][i]["remarks"] >> ps;
         json["vmess"][i]["address"] >> add;
-        if(custom_port.size())
-            port = custom_port;
-        else
-            json["vmess"][i]["port"] >> port;
+        port = custom_port.size() ? custom_port : GetMember(json["vmess"][i], "port");
+        if(port == "0")
+            continue;
         json["vmess"][i]["subid"] >> subid;
 
         if(subid.size())
@@ -264,7 +264,7 @@ void explodeVmessConf(std::string content, const std::string &custom_port, bool
         node.remarks = ps;
         node.id = index;
         node.server = add;
-        node.port = to_int(port);
+        node.port = to_int(port, 1);
         nodes.push_back(node);
     }
     return;
@@ -328,6 +328,8 @@ void explodeSS(std::string ss, bool libev, const std::string &custom_port, nodeI
     }
     if(custom_port.size())
         port = custom_port;
+    if(port == "0")
+        return;
     if(ps.empty())
         ps = server + ":" + port;
 
@@ -335,7 +337,7 @@ void explodeSS(std::string ss, bool libev, const std::string &custom_port, nodeI
     node.group = group;
     node.remarks = ps;
     node.server = server;
-    node.port = to_int(port, 0);
+    node.port = to_int(port, 1);
     node.proxyStr = ssConstruct(server, port, password, method, plugin, pluginopts, ps, libev);
 }
 
@@ -405,15 +407,16 @@ void explodeSSD(std::string link, bool libev, const std::string &custom_port, st
         GetMember(singlenode, "plugin", plugin);
         GetMember(singlenode, "plugin_options", pluginopts);
 
-
         if(custom_port.size())
             port = custom_port;
+        if(port == "0")
+            continue;
 
         node.linkType = SPEEDTEST_MESSAGE_FOUNDSS;
         node.group = group;
         node.remarks = remarks;
         node.server = server;
-        node.port = to_int(port);
+        node.port = to_int(port, 1);
         node.proxyStr = ssConstruct(server, port, password, method, plugin, pluginopts, remarks, libev);
         node.id = index;
         nodes.push_back(node);
@@ -424,6 +427,9 @@ void explodeSSD(std::string link, bool libev, const std::string &custom_port, st
 
 void explodeSSAndroid(std::string ss, bool libev, const std::string &custom_port, std::vector<nodeInfo> &nodes)
 {
+    std::string ps, password, method, server, port, group = SS_DEFAULT_GROUP;
+    std::string plugin, pluginopts;
+
     Document json;
     nodeInfo node;
     int index = nodes.size();
@@ -435,17 +441,13 @@ void explodeSSAndroid(std::string ss, bool libev, const std::string &custom_port
 
     for(unsigned int i = 0; i < json["nodes"].Size(); i++)
     {
-        std::string ps, password, method, server, port, group = SS_DEFAULT_GROUP;
-        std::string plugin, pluginopts;
-
         server = GetMember(json["nodes"][i], "server");
         if(server.empty())
             continue;
         ps = GetMember(json["nodes"][i], "remarks");
-        if(custom_port.size())
-            port = custom_port;
-        else
-            port = GetMember(json["nodes"][i], "server_port");
+        port = custom_port.size() ? custom_port : GetMember(json["nodes"][i], "server_port");
+        if(port == "0")
+            continue;
         if(ps.empty())
             ps = server + ":" + port;
         password = GetMember(json["nodes"][i], "password");
@@ -458,7 +460,7 @@ void explodeSSAndroid(std::string ss, bool libev, const std::string &custom_port
         node.group = group;
         node.remarks = ps;
         node.server = server;
-        node.port = to_int(port);
+        node.port = to_int(port, 1);
         node.proxyStr = ssConstruct(server, port, password, method, plugin, pluginopts, ps, libev);
         nodes.push_back(node);
         index++;
@@ -479,14 +481,11 @@ void explodeSSConf(std::string content, const std::string &custom_port, bool lib
     for(unsigned int i = 0; i < json["configs"].Size(); i++)
     {
         json["configs"][i]["remarks"] >> ps;
-        if(custom_port.size())
-            port = custom_port;
-        else
-            json["configs"][i]["server_port"] >> port;
+        port = custom_port.size() ? custom_port : GetMember(json["configs"][i], "server_port");
+        if(port == "0")
+            continue;
         if(ps.empty())
-        {
             ps = server + ":" + port;
-        }
 
         json["configs"][i]["password"] >> password;
         json["configs"][i]["method"] >> method;
@@ -499,7 +498,7 @@ void explodeSSConf(std::string content, const std::string &custom_port, bool lib
         node.remarks = ps;
         node.id = index;
         node.server = server;
-        node.port = to_int(port);
+        node.port = to_int(port, 1);
         node.proxyStr = ssConstruct(server, port, password, method, plugin, pluginopts, ps, libev);
         nodes.push_back(node);
         index++;
@@ -544,6 +543,8 @@ void explodeSSR(std::string ssr, bool ss_libev, bool ssr_libev, const std::strin
     password = urlsafe_base64_decode(password);
     if(custom_port.size())
         port = custom_port;
+    if(port == "0")
+        return;
 
     if(group.empty())
         group = SSR_DEFAULT_GROUP;
@@ -556,7 +557,7 @@ void explodeSSR(std::string ssr, bool ss_libev, bool ssr_libev, const std::strin
     node.group = group;
     node.remarks = remarks;
     node.server = server;
-    node.port = to_int(port, 0);
+    node.port = to_int(port, 1);
     if(find(ss_ciphers.begin(), ss_ciphers.end(), method) != ss_ciphers.end() && (obfs.empty() || obfs == "plain") && (protocol.empty() || protocol == "origin"))
     {
         node.linkType = SPEEDTEST_MESSAGE_FOUNDSS;
@@ -586,7 +587,7 @@ void explodeSSRConf(std::string content, const std::string &custom_port, bool ss
         port = GetMember(json, "server_port");
         node.remarks = server + ":" + port;
         node.server = server;
-        node.port = to_int(port);
+        node.port = to_int(port, 1);
         method = GetMember(json, "method");
         obfs = GetMember(json, "obfs");
         protocol = GetMember(json, "protocol");
@@ -617,10 +618,9 @@ void explodeSSRConf(std::string content, const std::string &custom_port, bool ss
             group = SSR_DEFAULT_GROUP;
         json["configs"][i]["remarks"] >> remarks;
         json["configs"][i]["server"] >> server;
-        if(custom_port.size())
-            port = custom_port;
-        else
-            json["configs"][i]["server_port"] >> port;
+        port = custom_port.size() ? custom_port : GetMember(json["configs"][i], "server_port");
+        if(port == "0")
+            continue;
         if(remarks.empty())
             remarks = server + ":" + port;
 
@@ -638,7 +638,7 @@ void explodeSSRConf(std::string content, const std::string &custom_port, bool ss
         node.remarks = remarks;
         node.id = index;
         node.server = server;
-        node.port = to_int(port);
+        node.port = to_int(port, 1);
         node.proxyStr = ssrConstruct(group, remarks, remarks_base64, server, port, protocol, method, obfs, password, obfsparam, protoparam, ssr_libev);
         nodes.push_back(node);
         index++;
@@ -679,12 +679,14 @@ void explodeSocks(std::string link, const std::string &custom_port, nodeInfo &no
         remarks = server + ":" + port;
     if(custom_port.size())
         port = custom_port;
+    if(port == "0")
+        return;
 
     node.linkType = SPEEDTEST_MESSAGE_FOUNDSOCKS;
     node.group = group;
     node.remarks = remarks;
     node.server = server;
-    node.port = to_int(port, 0);
+    node.port = to_int(port, 1);
     node.proxyStr = socksConstruct(remarks, server, port, username, password);
 }
 
@@ -704,12 +706,14 @@ void explodeHTTP(std::string link, const std::string &custom_port, nodeInfo &nod
         remarks = server + ":" + port;
     if(custom_port.size())
         port = custom_port;
+    if(port == "0")
+        return;
 
     node.linkType = SPEEDTEST_MESSAGE_FOUNDHTTP;
     node.group = group;
     node.remarks = remarks;
     node.server = server;
-    node.port = to_int(port, 0);
+    node.port = to_int(port, 1);
     node.proxyStr = httpConstruct(remarks, server, port, username, password, strFind(link, "/https"));
 }
 
@@ -764,12 +768,14 @@ void explodeHTTPSub(std::string link, const std::string &custom_port, nodeInfo &
         remarks = server + ":" + port;
     if(custom_port.size())
         port = custom_port;
+    if(port == "0")
+        return;
 
     node.linkType = SPEEDTEST_MESSAGE_FOUNDHTTP;
     node.group = group;
     node.remarks = remarks;
     node.server = server;
-    node.port = to_int(port, 0);
+    node.port = to_int(port, 1);
     node.proxyStr = httpConstruct(remarks, server, port, username, password, tls);
 }
 
@@ -806,6 +812,8 @@ void explodeTrojan(std::string trojan, const std::string &custom_port, nodeInfo
         return;
     if(custom_port.size())
         port = custom_port;
+    if(port == "0")
+        return;
 
     host = getUrlArg(addition, "peer");
 
@@ -818,7 +826,7 @@ void explodeTrojan(std::string trojan, const std::string &custom_port, nodeInfo
     node.group = TROJAN_DEFAULT_GROUP;
     node.remarks = remark;
     node.server = server;
-    node.port = to_int(port, 0);
+    node.port = to_int(port, 1);
     node.proxyStr = trojanConstruct(remark, server, port, psk, host, true);
 }
 
@@ -837,6 +845,8 @@ void explodeQuan(std::string quan, const std::string &custom_port, nodeInfo &nod
         ps = trim(configs[0]);
         add = trim(configs[2]);
         port = custom_port.size() ? custom_port : trim(configs[3]);
+        if(port == "0")
+            return;
         cipher = trim(configs[4]);
         id = trim(replace_all_distinct(configs[5], "\"", ""));
 
@@ -878,7 +888,7 @@ void explodeQuan(std::string quan, const std::string &custom_port, nodeInfo &nod
         node.group = group;
         node.remarks = ps;
         node.server = add;
-        node.port = to_int(port, 0);
+        node.port = to_int(port, 1);
         node.proxyStr = vmessConstruct(add, port, type, id, aid, net, cipher, path, host, edge, tls);
     }
 }
@@ -900,6 +910,8 @@ void explodeNetch(std::string netch, bool ss_libev, bool ssr_libev, const std::s
     tfo = GetMember(json, "EnableTFO");
     scv = GetMember(json, "AllowInsecure");
     port = custom_port.size() ? custom_port : GetMember(json, "Port");
+    if(port == "0")
+        return;
     method = GetMember(json, "EncryptMethod");
     password = GetMember(json, "Password");
     if(remark.empty())
@@ -978,7 +990,7 @@ void explodeNetch(std::string netch, bool ss_libev, bool ssr_libev, const std::s
 
     node.remarks = remark;
     node.server = address;
-    node.port = (unsigned short)to_int(port, 0);
+    node.port = (unsigned short)to_int(port, 1);
 }
 
 void explodeClash(Node yamlnode, const std::string &custom_port, std::vector<nodeInfo> &nodes, bool ss_libev, bool ssr_libev)
@@ -1000,7 +1012,7 @@ void explodeClash(Node yamlnode, const std::string &custom_port, std::vector<nod
         singleproxy["name"] >>= ps;
         singleproxy["server"] >>= server;
         port = custom_port.empty() ? safe_as<std::string>(singleproxy["port"]) : custom_port;
-        if(port.empty())
+        if(port.empty() || port == "0")
             continue;
         udp = safe_as<std::string>(singleproxy["udp"]);
         scv = safe_as<std::string>(singleproxy["skip-cert-verify"]);
@@ -1056,8 +1068,7 @@ void explodeClash(Node yamlnode, const std::string &custom_port, std::vector<nod
             {
                 plugin = "simple-obfs";
                 singleproxy["obfs"] >>= pluginopts_mode;
-                if(singleproxy["obfs-host"].IsDefined())
-                    singleproxy["obfs-host"] >>= pluginopts_host;
+                singleproxy["obfs-host"] >>= pluginopts_host;
             }
             else
                 plugin.clear();
@@ -1148,7 +1159,7 @@ void explodeClash(Node yamlnode, const std::string &custom_port, std::vector<nod
         node.group = group;
         node.remarks = ps;
         node.server = server;
-        node.port = to_int(port);
+        node.port = to_int(port, 1);
         node.id = index;
         nodes.push_back(node);
         index++;
@@ -1180,6 +1191,8 @@ void explodeShadowrocket(std::string rocket, const std::string &custom_port, nod
         return;
     if(custom_port.size())
         port = custom_port;
+    if(port == "0")
+        return;
     remarks = UrlDecode(getUrlArg(addition, "remark"));
     obfs = getUrlArg(addition, "obfs");
     if(obfs.size())
@@ -1251,6 +1264,8 @@ void explodeKitsunebi(std::string kit, const std::string &custom_port, nodeInfo
     }
     if(custom_port.size())
         port = custom_port;
+    if(port == "0")
+        return;
     net = getUrlArg(addition, "network");
     tls = getUrlArg(addition, "tls") == "true" ? "tls" : "";
     host = getUrlArg(addition, "ws.host");
@@ -1338,6 +1353,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
             {
                 server = trim(configs[1]);
                 port = custom_port.empty() ? trim(configs[2]) : custom_port;
+                if(port == "0")
+                    continue;
                 method = trim(configs[3]);
                 password = trim(configs[4]);
 
@@ -1376,6 +1393,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
         case "ss"_hash: //surge 3 style ss proxy
             server = trim(configs[1]);
             port = custom_port.empty() ? trim(configs[2]) : custom_port;
+            if(port == "0")
+                continue;
 
             for(i = 3; i < configs.size(); i++)
             {
@@ -1413,6 +1432,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
             node.group = SOCKS_DEFAULT_GROUP;
             server = trim(configs[1]);
             port = custom_port.empty() ? trim(configs[2]) : custom_port;
+            if(port == "0")
+                continue;
             if(configs.size() >= 5)
             {
                 username = trim(configs[3]);
@@ -1438,6 +1459,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
         case "vmess"_hash: //surge 4 style vmess proxy
             server = trim(configs[1]);
             port = custom_port.empty() ? trim(configs[2]) : custom_port;
+            if(port == "0")
+                continue;
             net = "tcp";
             method = "auto";
 
@@ -1486,6 +1509,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
             node.group = HTTP_DEFAULT_GROUP;
             server = trim(configs[1]);
             port = custom_port.empty() ? trim(configs[2]) : custom_port;
+            if(port == "0")
+                continue;
             for(i = 3; i < configs.size(); i++)
             {
                 vArray = split(configs[i], "=");
@@ -1508,6 +1533,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
             node.group = TROJAN_DEFAULT_GROUP;
             server = trim(configs[1]);
             port = custom_port.empty() ? trim(configs[2]) : custom_port;
+            if(port == "0")
+                continue;
 
             for(i = 3; i < configs.size(); i++)
             {
@@ -1537,6 +1564,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
 
             server = trim(configs[1]);
             port = custom_port.empty() ? trim(configs[2]) : custom_port;
+            if(port == "0")
+                continue;
 
             for(i = 3; i < configs.size(); i++)
             {
@@ -1567,6 +1596,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
             case "shadowsocks"_hash: //quantumult x style ss/ssr link
                 server = trim(configs[0].substr(0, configs[0].rfind(":")));
                 port = custom_port.empty() ? trim(configs[0].substr(configs[0].rfind(":") + 1)) : custom_port;
+                if(port == "0")
+                    continue;
 
                 for(i = 1; i < configs.size(); i++)
                 {
@@ -1617,6 +1648,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
             case "vmess"_hash: //quantumult x style vmess link
                 server = trim(configs[0].substr(0, configs[0].rfind(":")));
                 port = custom_port.empty() ? trim(configs[0].substr(configs[0].rfind(":") + 1)) : custom_port;
+                if(port == "0")
+                    continue;
                 net = "tcp";
 
                 for(i = 1; i < configs.size(); i++)
@@ -1659,6 +1692,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
             case "trojan"_hash: //quantumult x style trojan link
                 server = trim(configs[0].substr(0, configs[0].rfind(":")));
                 port = custom_port.empty() ? trim(configs[0].substr(configs[0].rfind(":") + 1)) : custom_port;
+                if(port == "0")
+                    continue;
 
                 for(i = 1; i < configs.size(); i++)
                 {
@@ -1692,6 +1727,8 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
             case "http"_hash: //quantumult x style http links
                 server = trim(configs[0].substr(0, configs[0].rfind(":")));
                 port = custom_port.empty() ? trim(configs[0].substr(configs[0].rfind(":") + 1)) : custom_port;
+                if(port == "0")
+                    continue;
 
                 for(i = 1; i < configs.size(); i++)
                 {
@@ -1743,6 +1780,10 @@ bool explodeSurge(std::string surge, const std::string &custom_port, std::vector
 
 void explodeSSTap(std::string sstap, const std::string &custom_port, std::vector<nodeInfo> &nodes, bool ss_libev, bool ssr_libev)
 {
+    std::string configType, group, remarks, server, port;
+    std::string cipher;
+    std::string user, pass;
+    std::string protocol, protoparam, obfs, obfsparam;
     Document json;
     nodeInfo node;
     unsigned int index = nodes.size();
@@ -1752,15 +1793,12 @@ void explodeSSTap(std::string sstap, const std::string &custom_port, std::vector
 
     for(unsigned int i = 0; i < json["configs"].Size(); i++)
     {
-        std::string configType, group, remarks, server, port;
-        std::string cipher;
-        std::string user, pass;
-        std::string protocol, protoparam, obfs, obfsparam;
-
         json["configs"][i]["group"] >> group;
         json["configs"][i]["remarks"] >> remarks;
         json["configs"][i]["server"] >> server;
         port = custom_port.size() ? custom_port : GetMember(json["configs"][i], "server_port");
+        if(port == "0")
+            continue;
 
         if(remarks.empty())
             remarks = server + ":" + port;
@@ -1799,7 +1837,7 @@ void explodeSSTap(std::string sstap, const std::string &custom_port, std::vector
         node.remarks = remarks;
         node.id = index;
         node.server = server;
-        node.port = to_int(port);
+        node.port = to_int(port, 1);
         nodes.push_back(node);
     }
 }
diff --git a/src/subexport.cpp b/src/subexport.cpp
index d1634d3..2575f8e 100644
--- a/src/subexport.cpp
+++ b/src/subexport.cpp
@@ -460,10 +460,10 @@ bool matchRange(std::string &range, int target)
     return match;
 }
 
-std::string nodeRename(std::string remark, int groupID, const string_array &rename_array)
+std::string nodeRename(const std::string &orig_remark, int groupID, const string_array &rename_array)
 {
     string_array vArray;
-    std::string targetRange;
+    std::string targetRange, remark = orig_remark;
     string_size pos;
 
     for(const std::string &x : rename_array)
@@ -490,12 +490,15 @@ std::string nodeRename(std::string remark, int groupID, const string_array &rena
         if(matchRange(targetRange, groupID))
             remark = regReplace(remark, vArray[0], vArray[1]);
     }
+    if(remark.empty())
+        return orig_remark;
     return remark;
 }
 
-std::string removeEmoji(std::string remark)
+std::string removeEmoji(const std::string &orig_remark)
 {
     char emoji_id[2] = {(char)-16, (char)-97};
+    std::string remark = orig_remark;
     while(true)
     {
         if(remark[0] == emoji_id[0] && remark[1] == emoji_id[1])
@@ -503,6 +506,8 @@ std::string removeEmoji(std::string remark)
         else
             break;
     }
+    if(remark.empty())
+        return orig_remark;
     return remark;
 }