The company has five insurances and one gold, and wants me to apply for an employment unemployment certificate. Employment card or unemployment card?

Yes, the new company really needs to apply for an employment permit to provide social security for new employees. This is actually the unemployment certificate you said. The full name of this certificate is Employment and Unemployment Registration Certificate.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.