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 # Abstract
 ## Feature
-* Support direction:rtl
-	* For international useage, support [direction:rtl](https://developer.mozilla.org/en-US/docs/Web/CSS/direction)
-	* Pull Request: https://github.com/apache/incubator-weex/pull/1664
+* Support arm64 & ndk18 on Android platform.
+* Android JSC Runtime refactor.
+* Android & iOS multi-size screen & rotation support.
+* Background JS thread on iOS.
+* Log module on iOS and Android to support redirection
+* Synchronous call of component methods.
+* Unified C++ log system of WeexCore.
 
-* Support richtext component
-	* Support richtext component [richtext](http://weex-project.io/cn/references/components/richtext.html)
-	* Pull Request: https://github.com/apache/incubator-weex/pull/1796
+## Main Bugfix
+* Animation module crash on iOS.
+* RTL layout crash on iOS.
+* NSTimer not removed by WXTimerModule on iOS.
+* Occasionally showing placeholder instead of main image on iOS.
+* Animation end progress error on iOS.
+* Some NPE issues on Android.
+* Closing fd multiple times on Android IPC.
+* box-shadow crash protection on Android.
+* GPU texture size overflow protection on Android.
+* Weexcore.so loading failure problem on Android.
 
-*  Performance optimization(init)
-	* rm useless log && reduce reflection
-	* Pull Request: https://github.com/apache/incubator-weex/pull/1844
-
-* **Major change** refine weex code:（integration code from weex_core and weex_v8core）
-    * pr : https://github.com/apache/incubator-weex/pull/1999
-    * change log:
-    	* Modify file naming from capitalized hump to lowercase
-    	* Modify the header file inclusion method, mainly based on google style
-    	* Change the file directory and move the basic function files to the base directory
-    	* Merge jssengine code into WeexCore repository, integrate compilation
-    	* Add libWTF.so to adapt to compile
-    	
-* send interaction time with event(after 8s)
-	* Pull Request ：
-		* https://github.com/apache/incubator-weex/pull/2000
-		* https://github.com/apache/incubator-weex/pull/2002
-
-* JsEngine multi-threaded
-    * The jss sub-process adds I/O Thread, which is specially used to handle IPC message forwarding. Move the IPC operation originally attached to jsThread to I/O Thread. 
-    * The jss sub-process adds a JSThread to execute the tag. The page instance for use_back_thread=true holds a VM for each thread, independent of each other. The two threads do not interfere with each other, so that they can run in parallel.
-
-* ***Major change** Remove AutoConfigScan
-    * Pull Request: https://github.com/apache/incubator-weex/pull/2142
-
-* Throws the exception in the componentHooks callback and hands it over to the client.
-    * Pull Request: https://github.com/apache/incubator-weex/pull/2285
-
-* Add completion callback for registerService.
-  * Pull Request: https://github.com/apache/incubator-weex/pull/1776
-
-* Supprot devtool show the new performance info
-  * Pull Request : <https://github.com/apache/incubator-weex/pull/1751>
-
-* Support change device width and height by external interface
-  * Pull Request:  <https://github.com/apache/incubator-weex/pull/2263>
-
-## Bugfix
-*  Emoji not show on Android 9.0(init)
-	* Emoji not show on Android 9.0(init)
-	* Pull Request:  https://github.com/apache/incubator-weex/pull/1804/files
-
-* Support ontouch event on scroller component
-	* Pull Request: https://github.com/apache/incubator-weex/pull/1896
-
-* Fix NPE && No such Element Exception
-	* Pull Request: https://github.com/apache/incubator-weex/pull/1896
-
-* Bugfix java.lang.NullPointerException: println needs a message
-	* Pull Request: https://github.com/apache/incubator-weex/pull/1925
-
-* ignore fixed element for interactionTime
-	* Pull Request：https://github.com/apache/incubator-weex/pull/1900
-
-* Use JSON to find bundleType
-	* Pull Request：https://github.com/apache/incubator-weex/pull/1927
-
-* Upload attribute information if list's column count equals or smaller than 0 
-	* Pull Request: https://github.com/apache/incubator-weex/pull/1957/files
-
-* try to fix threadpool rejectexception cause  shutdown 
-	* Pull Request：https://github.com/apache/incubator-weex/pull/2001
-
-* try to fix js exception: scroll event.xxx undefined
-    * Pull Request: https://github.com/apache/incubator-weex/pull/2034
-
-* fix multithread crash : task excute after instance destroy
-    * Pull Request: https://github.com/apache/incubator-weex/pull/2029
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