The registration card is signed by the local human resources and social security bureau, and the mailing address of the file is the local public employment and talent service center?

According to the information provided, the registration card is signed by the local human resources and social security bureau and the mailing address of the file is the local public employment and talent service center.

In China, new employees usually need to report for duty. When going through the registration formalities, employees need to send the registration card to the local human resources and social security bureau for endorsement to prove that they have formal employment. After completing the endorsement, the employee's file will be mailed to the local public employment and talent service center for management.

Here are some pictures showing this process:

I hope this answer will help you!