How to configure standby mode?

Which system do you use? Android, Ubuntu, OOWOW or others?

   Android

Which version of system do you use? Khadas official images, self built images, or others?

self built images

Please describe your issue below:

Please tell me the code configuration modification process patchs for configuring to standby mode?
Thank you !!!

Hello @Lexus

@goenjoy @xiong.zhang will help you here.