Which is better, Zheng Ning's public examination or Zhonggong's?

I have attended many trainings before, and I have attended all public schools in China. I feel just so-so. Although it is a big organization, I am very happy with my teachers. Zheng Ning's service is very good, and the teacher spoke in detail, especially the information analysis. The teacher is young but very powerful, which shows that this successful promotion is actually very suitable for him. There is no need to quote very expensive, and the money is not blown by the wind.