diff --git a/cmd/config/decode.go b/cmd/config/decode.go
index 296571a..ad4d5f8 100644
--- a/cmd/config/decode.go
+++ b/cmd/config/decode.go
@@ -132,20 +132,9 @@ func decodeIPv6(rawConfig *RawConfig, config *Config) {
 
 func decodeProxy(rawConfig *RawConfig, config *Config) {
     config.Proxy = rawConfig.Proxy
-    if config.Proxy.Core == "" {
-        config.Proxy.Core = "xray" // use xray in default
-    }
-    if config.Proxy.Core != "xray" && config.Proxy.Core != "v2ray" && config.Proxy.Core != "sagray" {
-        log.Warningf("Unknown core type -> %s", config.Proxy.Core)
-    }
-    if config.Proxy.Core != "xray" && config.Proxy.Core != "sagray" && !config.Proxy.Sniff.Redirect {
-        log.Warningf("V2fly core couldn't disable redirect in sniff (aka `routeOnly` option)")
-    }
-    if config.Proxy.Core != "xray" && len(config.Proxy.Sniff.Exclude) != 0 {
-        log.Warningf("The exclude list in sniff options can only use for Xray-core")
-    }
+    // TODO: add proxy bin option
     log.Debugf("Proxy log level -> %s", config.Proxy.Log)
-    log.Debugf("Core type -> %s", config.Proxy.Core)
+    //log.Debugf("Core type -> %s", config.Proxy.Core)
     log.Debugf("Http inbounds -> %v", config.Proxy.Http)
     log.Debugf("Socks5 inbounds -> %v", config.Proxy.Socks)
     log.Debugf("Add-on inbounds -> %v", config.Proxy.AddOn)
diff --git a/cmd/config/default.go b/cmd/config/default.go
index c976548..5dfd6c5 100644
--- a/cmd/config/default.go
+++ b/cmd/config/default.go
@@ -11,9 +11,10 @@ import (
 )
 
 var defaultConfig = map[string]interface{}{
+    // TODO: add proxy bin option
     "proxy": map[string]string{
-        "core": "xray",
-        "log":  "warning",
+        //"core": "xray",
+        "log": "warning",
     },
     "network": map[string]interface{}{
         "bypass": []string{
diff --git a/cmd/controller.go b/cmd/controller.go
index 2609fc8..96828ec 100644
--- a/cmd/controller.go
+++ b/cmd/controller.go
@@ -71,15 +71,21 @@ func loadProxy(settings *config.Config) {
 }
 
 func runProxy(settings *config.Config) {
-    if settings.Proxy.Core == "xray" { // xray-core
-        runProcess([]string{"XRAY_LOCATION_ASSET=" + assetDir}, "xray", "-confdir", configDir)
-    } else if settings.Proxy.Core == "v2ray" { // v2fly-core
-        runProcess([]string{"V2RAY_LOCATION_ASSET=" + assetDir}, "v2ray", "run", "-d", configDir)
-    } else if settings.Proxy.Core == "sagray" { // sager-core
-        runProcess([]string{"V2RAY_LOCATION_ASSET=" + assetDir}, "sagray", "run", "-confdir", configDir)
-    } else {
-        log.Panicf("Unknown core type -> %s", settings.Proxy.Core)
+    //if settings.Proxy.Core == "xray" { // xray-core
+    //    runProcess([]string{"XRAY_LOCATION_ASSET=" + assetDir}, "xray", "-confdir", configDir)
+    //} else if settings.Proxy.Core == "v2ray" { // v2fly-core
+    //    runProcess([]string{"V2RAY_LOCATION_ASSET=" + assetDir}, "v2ray", "run", "-d", configDir)
+    //} else if settings.Proxy.Core == "sagray" { // sager-core
+    //    runProcess([]string{"V2RAY_LOCATION_ASSET=" + assetDir}, "sagray", "run", "-confdir", configDir)
+    //} else {
+    //    log.Panicf("Unknown core type -> %s", settings.Proxy.Core)
+    //}
+    assetEnv := []string{
+        "XRAY_LOCATION_ASSET=" + assetDir,  // xray asset folder
+        "V2RAY_LOCATION_ASSET=" + assetDir, // v2ray / sagray asset folder
     }
+    // TODO: add proxy bin options
+    runProcess(assetEnv, "xray", "run", "-confdir", configDir)
 }
 
 func runRadvd(settings *config.Config) {
diff --git a/cmd/proxy/main.go b/cmd/proxy/main.go
index 82172f8..067444f 100644
--- a/cmd/proxy/main.go
+++ b/cmd/proxy/main.go
@@ -7,8 +7,8 @@ import (
 )
 
 type Config struct {
+    //Bin  string         `yaml:"bin" json:"bin" toml:"bin"`
     Log   string         `yaml:"log" json:"log" toml:"log"`
-    Core  string         `yaml:"core" json:"core" toml:"core"`
     Http  map[string]int `yaml:"http" json:"http" toml:"http"`
     Socks map[string]int `yaml:"socks" json:"socks" toml:"socks"`
     AddOn []interface{}  `yaml:"addon" json:"addon" toml:"addon"`
diff --git a/cmd/xproxy.go b/cmd/xproxy.go
index b114dfe..c63a276 100644
--- a/cmd/xproxy.go
+++ b/cmd/xproxy.go
@@ -70,6 +70,8 @@ func xproxyInit() {
     log.Debugf("Assets folder -> %s", assetDir)
     log.Debugf("Config file -> %s", configFile)
 
+    // TODO: add PROXY_BIN env option
+
     if os.Getenv("IPV4_TABLE") != "" {
         v4RouteTable, _ = strconv.Atoi(os.Getenv("IPV4_TABLE"))
     }