You are able to get the installation package of 排水法 1.0.1 free of charge and have a look at users' reviews on Droid Informer. The app works fine on Android 4.0 and above. The download of this application is 100% safe. The tool has been originally designed by Educational Publishing House, Limited and it relates to the Educational category.
Over 0,5K users downloaded 排水法 and its latest update was launched on Dec 22, 2016. The app has the average rating 4.4 on Google Play.