In fact, it is completely unnecessary, because there are many people in the human resources department of state-owned enterprises, some of whom are older, and will investigate your work background. It's best not to do this. For them, three months and one month are basically the same. The key is that you can impress the interviewer during the interview.

Some interview skills and resume making can be found in www.stzp.cn's "Workplace Information" column, which contains some good cases.