Download Alibaba APP on your phone, enter your account and password to log in. The prerequisite is that you must know the account and password of the sub-account. If you don’t have the account and password, you can’t log in. First, you need to ask your supervisor for your sub-account password, and then log in. You can also log in with your email and password, or with your mobile phone number and verification code, but many company mobile numbers are the mobile numbers of supervisors or bosses.