Hi Chenyang Xiong,
not everything technically feasible should be used for productive systems.
Please see Note 376856 for details. This states:
Passwords are essentially considered as a "secret between the user and the (one) system" and are dealt with accordingly.
and
The reason for the desire to keep passwords at an identical value in different systems might be the request for a single sign-on (SSO ) mechanism.
Regards,
Patrick