diff --git a/src/interfaces.cpp b/src/interfaces.cpp
index 997a89a..e55771e 100644
--- a/src/interfaces.cpp
+++ b/src/interfaces.cpp
@@ -1523,6 +1523,7 @@ std::string subconverter(RESPONSE_CALLBACK_ARGS)
     {
         groupID = -1;
         urls = split(insert_url, "|");
+        importItems(urls, true);
         for(std::string &x : urls)
         {
             x = regTrim(x);
@@ -1536,6 +1537,7 @@ std::string subconverter(RESPONSE_CALLBACK_ARGS)
         }
     }
     urls = split(url, "|");
+    importItems(urls, true);
     groupID = 0;
     for(std::string &x : urls)
     {
diff --git a/src/misc.cpp b/src/misc.cpp
index 5fdc383..e3e58c2 100644
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -796,21 +796,25 @@ std::string getMD5(const std::string &data)
     return result;
 }
 
+bool isInScope(const std::string &path)
+{
+#ifdef _WIN32
+    if(path.find(":\\") != path.npos || path.find("..") != path.npos)
+        return false;
+#else
+    if(path.find("/") == 0 || path.find("..") != path.npos)
+        return false;
+#endif // _WIN32
+    return true;
+}
+
 // TODO: Add preprocessor option to disable (open web service safety)
 std::string fileGet(const std::string &path, bool scope_limit)
 {
     std::string content;
 
-    if(scope_limit)
-    {
-#ifdef _WIN32
-        if(path.find(":\\") != path.npos || path.find("..") != path.npos)
-            return std::string();
-#else
-        if(path.find("/") == 0 || path.find("..") != path.npos)
-            return std::string();
-#endif // _WIN32
-    }
+    if(scope_limit && !isInScope(path))
+        return std::string();
 
     std::FILE *fp = std::fopen(path.c_str(), "rb");
     if(fp)
@@ -846,10 +850,12 @@ std::string fileGet(const std::string &path, bool scope_limit)
     return content;
 }
 
-bool fileExist(const std::string &path)
+bool fileExist(const std::string &path, bool scope_limit)
 {
     //using c++17 standard, but may cause problem on clang
     //return std::filesystem::exists(path);
+    if(scope_limit && !isInScope(path))
+        return false;
     return _access(path.data(), 4) != -1;
 }
 
diff --git a/src/misc.h b/src/misc.h
index c927409..4d4269b 100644
--- a/src/misc.h
+++ b/src/misc.h
@@ -82,7 +82,7 @@ std::string toUpper(const std::string &str);
 
 std::string fileGet(const std::string &path, bool scope_limit = false);
 int fileWrite(const std::string &path, const std::string &content, bool overwrite);
-bool fileExist(const std::string &path);
+bool fileExist(const std::string &path, bool scope_limit = false);
 bool fileCopy(const std::string &source, const std::string &dest);
 std::string fileToBase64(const std::string &filepath);
 std::string fileGetMD5(const std::string &filepath);
diff --git a/src/multithread.cpp b/src/multithread.cpp
index dae434b..68562d6 100644
--- a/src/multithread.cpp
+++ b/src/multithread.cpp
@@ -74,7 +74,7 @@ void safe_set_times(string_array &data)
 std::shared_future<std::string> fetchFileAsync(const std::string &path, const std::string &proxy, int cache_ttl, bool async)
 {
     std::shared_future<std::string> retVal;
-    if(fileExist(path))
+    if(fileExist(path, true))
         retVal = std::async(std::launch::async, [path](){return fileGet(path, true);});
     else if(isLink(path))
         retVal = std::async(std::launch::async, [path, proxy, cache_ttl](){return webGet(path, proxy, cache_ttl);});
diff --git a/src/nodemanip.cpp b/src/nodemanip.cpp
index 1cc1544..b2f990e 100644
--- a/src/nodemanip.cpp
+++ b/src/nodemanip.cpp
@@ -67,6 +67,13 @@ int addNodes(std::string link, std::vector<nodeInfo> &allNodes, int groupID, std
         }
     }
 
+    if(link == "nullnode")
+    {
+        writeLog(0, "Adding node placeholder...");
+        allNodes.emplace_back(nodeInfo{-1, -1, 0});
+        return 0;
+    }
+
     writeLog(LOG_TYPE_INFO, "Received Link.");
     if(startsWith(link, "https://t.me/socks") || startsWith(link, "tg://socks"))
         linkType = SPEEDTEST_MESSAGE_FOUNDSOCKS;
@@ -168,7 +175,7 @@ int addNodes(std::string link, std::vector<nodeInfo> &allNodes, int groupID, std
         node.groupID = groupID;
         if(custom_group.size())
             node.group = custom_group;
-        allNodes.push_back(node);
+        allNodes.emplace_back(node);
     }
     return 0;
 }
diff --git a/src/speedtestutil.cpp b/src/speedtestutil.cpp
index 188930d..b8c3060 100644
--- a/src/speedtestutil.cpp
+++ b/src/speedtestutil.cpp
@@ -769,6 +769,7 @@ void explodeHTTPSub(std::string link, const std::string &custom_port, nodeInfo &
 void explodeTrojan(std::string trojan, const std::string &custom_port, nodeInfo &node)
 {
     std::string server, port, psk, addition, remark, host;
+    tribool tfo, scv;
     string_array vArray;
     trojan.erase(0, 9);
     string_size pos = trojan.rfind("#");
@@ -778,7 +779,7 @@ void explodeTrojan(std::string trojan, const std::string &custom_port, nodeInfo
         remark = UrlDecode(trojan.substr(pos + 1));
         trojan.erase(pos);
     }
-    pos = trojan.rfind("?");
+    pos = trojan.find("?");
     if(pos != trojan.npos)
     {
         addition = trojan.substr(pos + 1);
@@ -803,6 +804,8 @@ void explodeTrojan(std::string trojan, const std::string &custom_port, nodeInfo
         return;
 
     host = getUrlArg(addition, "peer");
+    tfo = getUrlArg(addition, "tfo");
+    scv = getUrlArg(addition, "allowInsecure");
 
     if(remark.empty())
         remark = server + ":" + port;
@@ -814,7 +817,7 @@ void explodeTrojan(std::string trojan, const std::string &custom_port, nodeInfo
     node.remarks = remark;
     node.server = server;
     node.port = to_int(port, 1);
-    node.proxyStr = trojanConstruct(node.group, remark, server, port, psk, host, true);
+    node.proxyStr = trojanConstruct(node.group, remark, server, port, psk, host, true, tribool(), tfo, scv);
 }
 
 void explodeQuan(std::string quan, const std::string &custom_port, nodeInfo &node)
diff --git a/src/templates.cpp b/src/templates.cpp
index f6f69df..34b5c5e 100644
--- a/src/templates.cpp
+++ b/src/templates.cpp
@@ -290,7 +290,7 @@ int renderClashScript(YAML::Node &base_rule, std::vector<ruleset_content> &rules
             }
             if(remote_path_prefix.size())
             {
-                if(isLink(rule_path) || startsWith(rule_path, "data:"))
+                if(fileExist(rule_path, true) || isLink(rule_path))
                 {
                     rule_name = std::to_string(hash_(rule_group + rule_path));
                     names[rule_name] = rule_group;
@@ -314,6 +314,7 @@ int renderClashScript(YAML::Node &base_rule, std::vector<ruleset_content> &rules
                 continue;
             }
 
+            retrieved_rules = convertRuleset(retrieved_rules, x.rule_type);
             char delimiter = getLineBreak(retrieved_rules);
 
             strStrm.clear();