If it is a cancellation, this will be troublesome. At present, Tian Tian Fund has no online cancellation function, nor can it be cancelled by telephone. If you really want to cancel, you must mail your personal information, ID card, bank card copy and cancellation application form to Tian Tian Fund Headquarters. For the specific address, please refer to Tian Tian Fund official website. If you don't want to use it, just uninstall it. Don't worry about it. As long as your account number, password and other things are not lost, there will be no problem. I hope I can help you.