Can I use my social security card if I lost my ID?

Social security cards are generally not used as ID cards. ID cards and hukou are the only materials that can prove identity. But by plane or train without an ID card, you can also use the social security card to apply for a temporary ID from the airport or railroad public security authorities, or use the social security card to provide an ID number. Legal basis: "Resident Identity Card Law" Article 3

Resident identity card registration items include: name, gender, nationality, date of birth, permanent residence address, civil identity number, my photo, fingerprint information, the validity of the document and the issuing authority. Citizen identification number is a unique, lifelong identity code for each citizen, and is compiled by the public security authorities in accordance with the national standard for citizen identification numbers. Citizens applying for the receipt, replacement or replacement of identity cards shall be registered with fingerprint information.