What is the Shanghai Touch game, how does it work?

According to the introduction of KL, Shanghai Touch is a Trivia game on the Android platform. There is currently a 1.9 version released on Mar 06, 2017, you can see the details below.

Shanghai is a mahjong solitaire.
The aim of the game is to remove all matching pairs of tiles.
Tiles must be free on either the left or right as well as on top.
In most cases, you must match tiles exactly to remove them.
But there are two exceptions: You can pick any two flower or season tiles.

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.