How to apply for retirement pension insurance after Germany returns to China?

Before leaving the country, cancel your account at the Immigration Bureau and keep your certificate.

Save your work contract expiration certificate.

Copy of passport, copy of visa and copy of entry certificate.

Your bank name, bank number and bank account number.

When you arrive in China, send a letter to the German Federal Ministry, Bundesversicherungsanstallfuer Angstelte, telling him that you have left Germany and want to get these pensions back. After they have reviewed it, they will give you an answer and a letter after a period of time, and will also remit money to your account.