1. There are certain requirements for the password format of JD.com.

2. This is because JD.com requires that the password must contain letters, numbers and special characters, and the length must be between 6 and 20 characters in order to protect the security of user accounts. This password format can increase the complexity of the password and improve the security of the account.

3. In addition to the password format, in order to protect the security of the account, it is also recommended that users change their passwords regularly, do not use the same password as other websites, and be careful to prevent attacks from phishing websites and malware. These are important measures to protect account security.