diff --git a/README.md b/README.md
index 3e26b85f..7acd0f03 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,25 @@
 # v2rayNG
 
+A V2Ray client for Android
+
+[![API](https://img.shields.io/badge/API-17%2B-yellow.svg?style=flat)](https://developer.android.com/about/versions/jelly-bean#android-4.2)
+[![Kotlin Version](https://img.shields.io/badge/Kotlin-1.3.40-blue.svg)](https://kotlinlang.org)
+[![GitHub commit activity](https://img.shields.io/github/commit-activity/m/2dust/v2rayNG)](https://github.com/2dust/v2rayNG/commits/master)
+[![CodeFactor](https://www.codefactor.io/repository/github/2dust/v2rayng/badge)](https://www.codefactor.io/repository/github/2dust/v2rayng)
+[![GitHub Releases](https://img.shields.io/github/downloads/2dust/v2rayNG/latest/total?logo=github)](https://github.com/2dust/v2rayNG/releases)
+
 <a href="https://play.google.com/store/apps/details?id=com.v2ray.ang">
 <img alt="Get it on Google Play" src="https://play.google.com/intl/en_us/badges/images/generic/en_badge_web_generic.png" width="165" height="64" />
 </a>
+
+### Usage
+
+See our [wiki](https://github.com/2dust/v2rayNG/wiki)
+
+### Development guide
+
+Android project under V2rayNG folder can be compiled directly in Android Studio, or using Gradle wrapper. But the v2ray core inside the aar is (probably) outdated.  
+The aar can be compiled from the Golang project under AndroidLibV2rayLite folder. For a quick start, read guide for [Go Mobile](https://github.com/golang/go/wiki/Mobile)
+and [Makefiles for Go Developers](https://tutorialedge.net/golang/makefiles-for-go-developers/)
+
+v2rayNG can run on Android Emulators, with minimum Android 5.0
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/AppConfig.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/AppConfig.kt
index 2956e477..fd4af4b4 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/AppConfig.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/AppConfig.kt
@@ -38,6 +38,7 @@ object AppConfig {
     const val androidpackagenamelistUrl = "https://raw.githubusercontent.com/2dust/androidpackagenamelist/master/proxy.txt"
     const val v2rayCustomRoutingListUrl = "https://raw.githubusercontent.com/2dust/v2rayCustomRoutingList/master/"
     const val v2rayNGIssues = "https://github.com/2dust/v2rayNG/issues"
+    const val v2rayNGWikiMode = "https://github.com/2dust/v2rayNG/wiki/Mode"
     const val promotionUrl = "https://1.2345345.xyz/ads.html"
 
     const val DNS_AGENT = "1.1.1.1"
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
index f36b9c12..b46eff3f 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
@@ -2,6 +2,7 @@ package com.v2ray.ang.ui
 
 import android.os.Bundle
 import android.support.v7.preference.*
+import android.view.View
 import com.v2ray.ang.R
 import com.v2ray.ang.AppConfig
 import com.v2ray.ang.util.Utils
@@ -70,7 +71,7 @@ class SettingsActivity : BaseActivity() {
 //        val feedback: Preference by lazy { findPreference(PREF_FEEDBACK) }
 //        val tgGroup: Preference by lazy { findPreference(PREF_TG_GROUP) }
 
-        private val mode: Preference by lazy { findPreference(AppConfig.PREF_MODE) }
+        private val mode by lazy { findPreference(AppConfig.PREF_MODE) as ListPreference }
 
         private fun restartProxy() {
             Utils.stopVService(requireContext())
@@ -164,6 +165,7 @@ class SettingsActivity : BaseActivity() {
                 updatePerAppProxy(newValue.toString())
                 true
             }
+            mode.dialogLayoutResource = R.layout.preference_with_help_link
 
 //            donate.onClick {
 //                startActivity<InappBuyActivity>()
@@ -231,4 +233,8 @@ class SettingsActivity : BaseActivity() {
             }
         }
     }
+
+    fun onModeHelpClicked(view: View) {
+        Utils.openUri(this, AppConfig.v2rayNGWikiMode)
+    }
 }
diff --git a/V2rayNG/app/src/main/res/layout/preference_with_help_link.xml b/V2rayNG/app/src/main/res/layout/preference_with_help_link.xml
new file mode 100644
index 00000000..da232f93
--- /dev/null
+++ b/V2rayNG/app/src/main/res/layout/preference_with_help_link.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Button xmlns:android="http://schemas.android.com/apk/res/android"
+        style="@style/Widget.AppCompat.Button.Borderless"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:onClick="onModeHelpClicked"
+        android:text="@string/title_mode_help"
+        android:textAlignment="textStart"
+        android:textStyle="italic" />
diff --git a/V2rayNG/app/src/main/res/values-zh-rCN/strings.xml b/V2rayNG/app/src/main/res/values-zh-rCN/strings.xml
index 2393ffa6..44675d2d 100644
--- a/V2rayNG/app/src/main/res/values-zh-rCN/strings.xml
+++ b/V2rayNG/app/src/main/res/values-zh-rCN/strings.xml
@@ -123,6 +123,7 @@
     <string name="summary_pref_promotion">一些推广,点击查看详情(捐赠可去除)</string>
 
     <string name="title_mode">模式</string>
+    <string name="title_mode_help">点此查看更多帮助</string>
 
     <string name="donate_error_setup">初始化错误:</string>
     <string name="donate_error_inventory">无法查询到项目</string>
diff --git a/V2rayNG/app/src/main/res/values-zh-rTW/strings.xml b/V2rayNG/app/src/main/res/values-zh-rTW/strings.xml
index 1385760e..db86bbc1 100644
--- a/V2rayNG/app/src/main/res/values-zh-rTW/strings.xml
+++ b/V2rayNG/app/src/main/res/values-zh-rTW/strings.xml
@@ -125,6 +125,7 @@
     <string name="summary_pref_promotion">一些推廣,點擊查看詳情(捐款可去除)</string>
 
     <string name="title_mode">模式</string>
+    <string name="title_mode_help">點此查看更多幫助</string>
 
     <string name="donate_error_setup">錯誤設定:</string>
     <string name="donate_error_inventory">Error querying inventory</string>
diff --git a/V2rayNG/app/src/main/res/values/strings.xml b/V2rayNG/app/src/main/res/values/strings.xml
index 9b63540d..1d4944a4 100644
--- a/V2rayNG/app/src/main/res/values/strings.xml
+++ b/V2rayNG/app/src/main/res/values/strings.xml
@@ -125,6 +125,7 @@
     <string name="summary_pref_promotion">Promotion,click for details(Donation can be removed)</string>
 
     <string name="title_mode">Mode</string>
+    <string name="title_mode_help">Click me for more help</string>
 
     <string name="donate_error_setup">Error Setup:</string>
     <string name="donate_error_inventory">Error querying inventory</string>