No CSTNET passport?
Sing up now
CSTNET passport is the combination of an email address and a password that you use to sign in to services like escience.cn, DDL , CSP, dHome, mail. If you don't have a CSTNET passport, you can sign up for free at any time.
CAS mail can be used as CSTNET passport to sign in.
Duckling Passport is upgraded to CSTNET passport.