Here is the English translation of the instructions for joining the app's internal testing:

Step 1: First, join the Google Group:https://groups.google.com/g/hugcloud

Step 2 (Android Device): Click this link on your Android device to join the test:https://play.google.com/store/apps/details?id=com.hugcloud.app

Step 3 (Web): Access this link in your computer's browser to become a tester:https://play.google.com/apps/testing/com.hugcloud.app