Unicom basic package does not support cancellation. If you need to cancel additional value-added services, you can log in to the online business hall of China Unicom and click the floating window on the right > Customer Service > Labor;
Log in to China Unicom APP > Service > Customer Service > My Customer Service > Transfer to Labor;
Wechat login binds "China Unicom Micro Hall" > switch to manual, access online customer service feedback and cancel.