The expiration date of the postgraduate work permit shall prevail.

The time for your graduate WP is based on the time passed by the Immigration Bureau. For example, if you send the application form to the Immigration Bureau on June 4, 65438, the Immigration Bureau will generally process the documents two months later, that is, March 4, and your PGWP visa will start on March 4, so the visa time does not need to be too detailed. Even if your work signing time is over and your general performance is good, the employer will be willing to help you renew it.

Small signs only need to be updated when you return to China. If you don't plan to return to China in the short term, you don't need to renew it. It doesn't matter.

The materials and procedures for renewing a small visa with pgwp are basically the same as those for renewing your study visa. The only difference is that you need a certificate issued by the school when you study, and you need a certificate issued by the employer after work.

My analogy is clear, based on the date of approval.