There are four apps you will need in China:

1. Wechat

You definitely need WeChat to communicate with anyone.

2. DiDi

DiDi is the Uber of China. It's so easy to use, which will benefit you so much. 

3. Baidu

You can search and translate in Baidu. It is more accurate than using Google Translate because it is made of the Chinese language.

4. Taobao

Taobao is a bigger and faster version of Amazon. It is the best haven on the internet for affordable stuff!