diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/dto/RoutingType.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/dto/RoutingType.kt
new file mode 100644
index 000000000..a98ac167c
--- /dev/null
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/dto/RoutingType.kt
@@ -0,0 +1,20 @@
+package com.v2ray.ang.dto
+
+enum class RoutingType(val fileName: String) {
+    WHITE("custom_routing_white"),
+    BLACK("custom_routing_black"),
+    GLOBAL("custom_routing_global"),
+    WHITE_IRAN("custom_routing_white_iran");
+
+    companion object {
+        fun fromIndex(index: Int): RoutingType {
+            return when (index) {
+                0 -> WHITE
+                1 -> BLACK
+                2 -> GLOBAL
+                3 -> WHITE_IRAN
+                else -> WHITE
+            }
+        }
+    }
+}
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/SettingsManager.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/SettingsManager.kt
index 0b1b4a124..f14caa829 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/SettingsManager.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/SettingsManager.kt
@@ -6,7 +6,12 @@ import android.text.TextUtils
 import com.v2ray.ang.AppConfig
 import com.v2ray.ang.AppConfig.GEOIP_PRIVATE
 import com.v2ray.ang.AppConfig.GEOSITE_PRIVATE
+import com.v2ray.ang.AppConfig.ROUTING_BLACK
+import com.v2ray.ang.AppConfig.ROUTING_GLOBAL
+import com.v2ray.ang.AppConfig.ROUTING_WHITE
+import com.v2ray.ang.AppConfig.ROUTING_WHITE_IRAN
 import com.v2ray.ang.AppConfig.TAG_DIRECT
+import com.v2ray.ang.dto.RoutingType
 import com.v2ray.ang.dto.RulesetItem
 import com.v2ray.ang.dto.ServerConfig
 import com.v2ray.ang.util.MmkvManager.decodeProfileConfig
@@ -27,13 +32,7 @@ object SettingsManager {
     }
 
     private fun getPresetRoutingRulesets(context: Context, index: Int = 0): MutableList<RulesetItem>? {
-        val fileName = when (index) {
-            0 -> "custom_routing_white"
-            1 -> "custom_routing_black"
-            2 -> "custom_routing_global"
-            3 -> "custom_routing_white_iran"
-            else -> "custom_routing_white"
-        }
+        val fileName = RoutingType.fromIndex(index).fileName
         val assets = Utils.readTextFromAssets(context, fileName)
         if (TextUtils.isEmpty(assets)) {
             return null
@@ -42,6 +41,7 @@ object SettingsManager {
         return JsonUtil.fromJson(assets, Array<RulesetItem>::class.java).toMutableList()
     }
 
+
     fun resetRoutingRulesets(context: Context, index: Int) {
         val rulesetList = getPresetRoutingRulesets(context, index) ?: return
         resetRoutingRulesetsCommon(rulesetList)