The most convenient way to use taxis in China is through the app Didi (Similar to Uber). (Play Store) (App Store). It has an English interface that should be set up as default outside of China. If not follow this gif to set it up. Your driver will be prompted that you are using the English settings and if you need to communicate with your driver for any reason, you can use the chatbox with the built-in translator feature to translate what your driver is saying.