diff --git a/mobile/src/main/java/com/github/shadowsocks/MainActivity.kt b/mobile/src/main/java/com/github/shadowsocks/MainActivity.kt
index e3cce8f6..f3738a73 100644
--- a/mobile/src/main/java/com/github/shadowsocks/MainActivity.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/MainActivity.kt
@@ -41,9 +41,7 @@ import android.support.v7.content.res.AppCompatResources
 import android.support.v7.preference.PreferenceDataStore
 import android.text.format.Formatter
 import android.util.Log
-import android.util.Patterns
 import android.view.View
-import android.webkit.URLUtil
 import android.widget.TextView
 import com.github.shadowsocks.App.Companion.app
 import com.github.shadowsocks.acl.Acl
@@ -67,7 +65,6 @@ import com.mikepenz.materialdrawer.model.interfaces.IDrawerItem
 import java.io.IOException
 import java.net.HttpURLConnection
 import java.net.InetSocketAddress
-import java.net.MalformedURLException
 import java.net.Proxy
 import java.net.URL
 import java.util.*
@@ -165,34 +162,28 @@ class MainActivity : AppCompatActivity(), ShadowsocksConnection.Interface, Drawe
      * Based on: https://android.googlesource.com/platform/frameworks/base/+/97bfd27/services/core/java/com/android/server/connectivity/NetworkMonitor.java#879
      */
     private fun testConnection(id: Int) {
+        val url = URL("https", when (app.currentProfile!!.route) {
+            Acl.CHINALIST -> "www.qualcomm.cn"
+            else -> "www.google.com"
+        }, "/generate_204")
+        val conn = (if (BaseService.usingVpnMode) url.openConnection() else
+            url.openConnection(Proxy(Proxy.Type.SOCKS,
+                    InetSocketAddress("127.0.0.1", DataStore.portProxy))))
+                as HttpURLConnection
+        conn.setRequestProperty("Connection", "close")
+        conn.instanceFollowRedirects = false
+        conn.useCaches = false
         val (success, result) = try {
-            val urlString = DataStore.testUrl
-            val url = URL(urlString)
-            if (url.protocol != "https")
-                throw MalformedURLException(getString(R.string.connection_test_url_non_https, urlString))
-            if (!URLUtil.isValidUrl(urlString) || !Patterns.WEB_URL.matcher(urlString).matches())
-                throw MalformedURLException(getString(R.string.connection_test_url_invalid, urlString))
-            val conn = (if (BaseService.usingVpnMode) url.openConnection() else
-                url.openConnection(Proxy(Proxy.Type.SOCKS,
-                        InetSocketAddress("127.0.0.1", DataStore.portProxy))))
-                    as HttpURLConnection
-            conn.setRequestProperty("Connection", "close")
-            conn.instanceFollowRedirects = false
-            conn.useCaches = false
-            try {
-                val start = SystemClock.elapsedRealtime()
-                val code = conn.responseCode
-                val elapsed = SystemClock.elapsedRealtime() - start
-                if (code == 204 || code == 200 && conn.responseLength == 0L)
-                    Pair(true, getString(R.string.connection_test_available, elapsed))
-                else throw IOException(getString(R.string.connection_test_error_status_code, code))
-            } catch (e: IOException) {
-                Pair(false, getString(R.string.connection_test_error, e.message))
-            } finally {
-                conn.disconnect()
-            }
-        } catch (e: MalformedURLException) {
-            Pair(false, getString(R.string.connection_test_url_error, e.message))
+            val start = SystemClock.elapsedRealtime()
+            val code = conn.responseCode
+            val elapsed = SystemClock.elapsedRealtime() - start
+            if (code == 204 || code == 200 && conn.responseLength == 0L)
+                Pair(true, getString(R.string.connection_test_available, elapsed))
+            else throw IOException(getString(R.string.connection_test_error_status_code, code))
+        } catch (e: IOException) {
+            Pair(false, getString(R.string.connection_test_error, e.message))
+        } finally {
+            conn.disconnect()
         }
         if (testCount == id) app.handler.post {
             if (success) statusText.text = result else {
diff --git a/mobile/src/main/java/com/github/shadowsocks/preference/DataStore.kt b/mobile/src/main/java/com/github/shadowsocks/preference/DataStore.kt
index 9cce48a3..144f2eab 100644
--- a/mobile/src/main/java/com/github/shadowsocks/preference/DataStore.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/preference/DataStore.kt
@@ -51,9 +51,6 @@ object DataStore {
         }
     val canToggleLocked: Boolean get() = publicStore.getBoolean(Key.directBootAware) == true
     val directBootAware: Boolean get() = app.directBootSupported && canToggleLocked
-    var testUrl: String
-        get() = publicStore.getString(Key.testUrl) ?: "https://www.google.com/generate_204"
-        set(value) = publicStore.putString(Key.testUrl, value)
     var serviceMode: String
         get() = publicStore.getString(Key.serviceMode) ?: Key.modeVpn
         set(value) = publicStore.putString(Key.serviceMode, value)
@@ -69,7 +66,6 @@ object DataStore {
 
     fun initGlobal() {
         // temporary workaround for support lib bug
-        if (publicStore.getString(Key.testUrl) == null) testUrl = testUrl
         if (publicStore.getString(Key.serviceMode) == null) serviceMode = serviceMode
         if (publicStore.getString(Key.portProxy) == null) portProxy = portProxy
         if (publicStore.getString(Key.portLocalDns) == null) portLocalDns = portLocalDns
diff --git a/mobile/src/main/java/com/github/shadowsocks/utils/Constants.kt b/mobile/src/main/java/com/github/shadowsocks/utils/Constants.kt
index 6b81b5ba..05f8e480 100644
--- a/mobile/src/main/java/com/github/shadowsocks/utils/Constants.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/utils/Constants.kt
@@ -49,7 +49,6 @@ object Key {
     const val bypass = "isBypassApps"
     const val udpdns = "isUdpDns"
     const val ipv6 = "isIpv6"
-    const val testUrl = "testUrl"
 
     const val host = "proxy"
     const val password = "sitekey"
diff --git a/mobile/src/main/res/values/strings.xml b/mobile/src/main/res/values/strings.xml
index f81e30e8..4479c013 100644
--- a/mobile/src/main/res/values/strings.xml
+++ b/mobile/src/main/res/values/strings.xml
@@ -20,13 +20,9 @@
   <string name="traffic">%s↑\t%s↓</string>
   <string name="stat_summary">Sent: \t\t\t\t\t%3$s\t↑\t%1$s\nReceived: \t%4$s\t↓\t%2$s</string>
   <string name="speed">%s/s</string>
-  <string name="connection_test_url">Connection Test URL</string>
   <string name="connection_test_pending">Check Connectivity</string>
   <string name="connection_test_testing">Testing…</string>
   <string name="connection_test_available">Success: %dms latency</string>
-  <string name="connection_test_url_error">Check connection test URL. %s</string>
-  <string name="connection_test_url_non_https">Non-HTTPS URL: %s</string>
-  <string name="connection_test_url_invalid">Invalid URL: %s</string>
   <string name="connection_test_error">Fail to detect internet connection: %s</string>
   <string name="connection_test_fail">Internet Unavailable</string>
   <string name="connection_test_error_status_code">Error code: #%d</string>
diff --git a/mobile/src/main/res/xml/pref_global.xml b/mobile/src/main/res/xml/pref_global.xml
index ccfb1ea9..d8bcbce8 100644
--- a/mobile/src/main/res/xml/pref_global.xml
+++ b/mobile/src/main/res/xml/pref_global.xml
@@ -12,10 +12,6 @@
     <SwitchPreference android:key="tcp_fastopen"
                       android:summary="@string/tcp_fastopen_summary"
                       android:title="TCP Fast Open"/>
-    <AutoSummaryEditTextPreference
-        android:key="testUrl"
-        android:title="@string/connection_test_url"
-        app:pref_summaryHasText="%s"/>
     <PreferenceCategory
         android:title="@string/advanced">
         <SimpleMenuPreference