The Education Office of China's embassy overseas is mainly responsible for the exchange and cooperation between the two countries in the field of education, and provides macro guidance and related services for international students in China.

The certificate issued by the Education Office of the Embassy shows that the returnees can enjoy the preferential treatment given by the state: for example, they can settle in Beijing and Shanghai and apply for venture capital (Shanghai gives software and salary venture capital, and Beijing also gives various tax incentives and rent-free venues, which varies from region to region). You can buy duty-free cars and enjoy tax benefits (although tariffs are gradually reduced, you can avoid purchase fees and other expenses). Prove that you have experience in studying abroad and deserve to keep it forever. It's easy to be recognized when looking for a job.

This degree needs to be certified by the Ministry of Education of China because:

If you plan to develop in China, it is essential to apply for the certification of China Ministry of Education. General enterprises and institutions will need you to provide this certificate when you apply for a job. The prerequisite for certification by the Ministry of Education is that you have obtained the certificate of returnees issued by foreign embassies, which is also called embassy notarization. The materials required for certification by the Ministry of Education are numerous and complicated. You must provide the originals of all the materials. The notary department will check the materials you provide one by one, and the waiting time will be longer.

Personal experience: after returning to China, I was only certified by the embassy, but not by the domestic Ministry of Education. It is said that many state-owned enterprises need to see this certification. I also confirmed this when I was looking for a job. But I don't want to go to a state-owned enterprise, so this is invalid. General companies don't require this. I'm in a foreign company again. Just watch the original. So it's up to you to do it or not.