The problem of Cydia automatically exiting after entering it is a common iPad2 Cydia crash problem. The reason for Cydia crash is caused by language problems, and the solution is relatively simple. The following is a tutorial to solve the problem of Cydia crash.
1. Please try to set the language to [English] and then open Cydia, open [Settings]-[General]-[Multi-language environment]-[Language], select English
2. Install ifunbox Wait for the PC transfer tool
3. Navigate to /User/Library and copy the Keyboard folder
4. Navigate to /Var/root/Library and paste the Keyboard folder
5. Restart the device and boot it up