Is Zhengzhou No.3 Mill easy to enter?

Zhengzhou three mills are easy to enter. According to the inquiry of official website of No.3 Grinding Institute, Zhengzhou Abrasive Abrasive Research Institute Co., Ltd. was established in 1958, which is the only comprehensive research and development institution in China abrasive industry. Interviews in this company are all simple math problems, probably at the high school level, so it is very easy to test logical thinking ability.