diff --git a/android/assets/game.atlas b/android/assets/game.atlas
index 02028bb9..897480db 100644
--- a/android/assets/game.atlas
+++ b/android/assets/game.atlas
@@ -405,7 +405,7 @@ BuildingIcons/Paper Maker
   index: -1
 BuildingIcons/Pentagon
   rotate: false
-  xy: 1202, 546
+  xy: 1304, 648
   size: 100, 100
   orig: 100, 100
   offset: 0, 0
@@ -818,21 +818,21 @@ ImprovementIcons/Quarry
   index: -1
 ImprovementIcons/Railroad
   rotate: false
-  xy: 894, 342
+  xy: 996, 342
   size: 100, 100
   orig: 100, 100
   offset: 0, 0
   index: -1
 TileSets/Default/Railroad
   rotate: false
-  xy: 894, 342
+  xy: 996, 342
   size: 100, 100
   orig: 100, 100
   offset: 0, 0
   index: -1
 TileSets/FantasyHex/Railroad
   rotate: false
-  xy: 894, 342
+  xy: 996, 342
   size: 100, 100
   orig: 100, 100
   offset: 0, 0
@@ -1035,7 +1035,7 @@ OtherIcons/MenuIcon
   index: -1
 OtherIcons/Pentagon
   rotate: false
-  xy: 1304, 648
+  xy: 1202, 546
   size: 100, 100
   orig: 100, 100
   offset: 0, 0
@@ -2127,7 +2127,7 @@ TechIcons/Radio
   index: -1
 TechIcons/Railroad
   rotate: false
-  xy: 996, 342
+  xy: 894, 342
   size: 100, 100
   orig: 100, 100
   offset: 0, 0
diff --git a/android/assets/game.png b/android/assets/game.png
index a83005fb..c97d8eac 100644
Binary files a/android/assets/game.png and b/android/assets/game.png differ
diff --git a/android/assets/jsons/Translations/Buildings.json b/android/assets/jsons/Translations/Buildings.json
index d39e1741..4c81a135 100644
--- a/android/assets/jsons/Translations/Buildings.json
+++ b/android/assets/jsons/Translations/Buildings.json
@@ -803,6 +803,7 @@
 		Italian:"Forte Mughal"
 		French:"Fort Monghol"
 		Polish:"Fort Mogołów"
+		Simplified_Chinese:"莫卧儿城塞"
 	}
 	
 	"Alhambra":{
diff --git a/android/assets/jsons/Translations/Techs.json b/android/assets/jsons/Translations/Techs.json
index b3e127dd..4f6204e1 100644
--- a/android/assets/jsons/Translations/Techs.json
+++ b/android/assets/jsons/Translations/Techs.json
@@ -727,6 +727,7 @@
 	"Radar":{
 		Italian:"Radar"
 		Russian:"Радар"
+		Simplified_Chinese:"雷达"
 	}
 	
 ///////// Technologies (Information Era)
@@ -770,6 +771,7 @@
 	"Mobile Tactics":{
 		Italian:"Tattiche mobili"
 		Russian:"Мобильная тактика"
+		Simplified_Chinese:"机动战术"
 	}
 
 	"Combined Arms":{
@@ -835,6 +837,7 @@
 		Italian:"Laser"
 		French:"Lasers"
 		Russian:"Лазеры"
+		Simplified_Chinese:"激光"
 	}
 
 	"Nanotechnology":{
diff --git a/android/assets/jsons/Translations/Terrains,Resources,Improvements.json b/android/assets/jsons/Translations/Terrains,Resources,Improvements.json
index 1a377ca4..91f9fb8c 100644
--- a/android/assets/jsons/Translations/Terrains,Resources,Improvements.json
+++ b/android/assets/jsons/Translations/Terrains,Resources,Improvements.json
@@ -847,4 +847,8 @@
 		Portuguese:"Alfândega"
 	}
 
+	"Barbarian encampment":{
+		Simplified_Chinese:"蛮族营地"
+	}
+
 }
\ No newline at end of file
diff --git a/android/assets/jsons/Translations/Units,Promotions.json b/android/assets/jsons/Translations/Units,Promotions.json
index ed7b9a2b..3f131480 100644
--- a/android/assets/jsons/Translations/Units,Promotions.json
+++ b/android/assets/jsons/Translations/Units,Promotions.json
@@ -186,6 +186,7 @@
 	"Brute":{	
 		Russian:"Громила"
 		Italian:"Bruto"
+		Simplified_Chinese:"蛮族勇士"
 	}
 
 
@@ -479,6 +480,7 @@
 		Italian:"Elefante da guerra"
 		French:"Éléphant de Guerre"
 		Russian:"Боевой слон"
+		Simplified_Chinese:"印度战象"
 	}
 	
 ////// Medieval units
@@ -590,6 +592,7 @@
 		Italian:"Lanzichenecco"
 		French:"Lansquenet"
 		Russian:"Ландскнехт"
+		Simplified_Chinese:"自由佣兵"
 	}
 
 	"Knight":{	
@@ -687,6 +690,7 @@
 		Italian:"Giannizzero"
 		French:"Janissaire"
 		Russian:"Янычары"
+		Simplified_Chinese:"苏丹亲兵"
 	}
 	
 	"Heals [amountHealed] damage if it kills a unit":{
@@ -741,6 +745,7 @@
 		Italian:"Sipahi"//same as in Italian
 		Russian:"Сипаи"
 		//same in french
+		Simplified_Chinese:"西帕希骑兵"
 	}
 	
 	"No movement cost to pillage":{
@@ -1136,6 +1141,10 @@
 		Russian:"Истребитель"
 	}
 
+	"Zero":{
+		Simplified_Chinese:"零式战斗机"
+	}
+
 	"Helicopter Gunship":{
 		Italian:"Elicottero da guerra"
 		Romanian:"Elicopter de atac"
diff --git a/android/build.gradle b/android/build.gradle
index bdb1fa63..cdbb2e09 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,6 +1,6 @@
 android {
-    buildToolsVersion "28.0.3"
-    compileSdkVersion 28
+    buildToolsVersion "29.0.2"
+    compileSdkVersion 29
     sourceSets {
         main {
             manifest.srcFile 'AndroidManifest.xml'
diff --git a/build.gradle b/build.gradle
index 2285ff81..dfa8620b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
 
-    ext.kotlinVersion = '1.3.41'
+    ext.kotlinVersion = '1.3.50'
 
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
@@ -8,6 +8,11 @@ buildscript {
 
 
     repositories {
+        // 以下四行代码为阿里gradle 源
+        maven{ url 'https://maven.aliyun.com/repository/jcenter'}
+        maven{ url 'https://maven.aliyun.com/repository/google'}
+        maven{ url 'https://maven.aliyun.com/repository/gradle-plugin'}
+        maven{ url 'https://maven.aliyun.com/repository/public'}
         google()
         mavenLocal()
         mavenCentral()
@@ -16,7 +21,7 @@ buildscript {
     }
     dependencies {
         classpath 'de.richsource.gradle.plugins:gwt-gradle-plugin:0.6'
-        classpath 'com.android.tools.build:gradle:3.4.2'
+        classpath 'com.android.tools.build:gradle:3.5.0'
         classpath 'com.mobidevelop.robovm:robovm-gradle-plugin:2.3.1'
     }
 }
@@ -36,6 +41,11 @@ allprojects {
     }
 
     repositories {
+        // 以下四行代码为阿里gradle 源
+        maven{ url 'https://maven.aliyun.com/repository/jcenter'}
+        maven{ url 'https://maven.aliyun.com/repository/google'}
+        maven{ url 'https://maven.aliyun.com/repository/gradle-plugin'}
+        maven{ url 'https://maven.aliyun.com/repository/public'}
         google()
         jcenter()
         mavenLocal()