Yu Zheng is preparing for the jewelry appraiser certificate. Chengyi is very humble in the comment area.

![_ 20220902133837.png] (https://imgs.the9c.com/2022/0902/8b80fb9efde7ef76db307d27bf06f1d7.png)

On September 2, Yu Zheng posted that he had learned the skills for a long time and was ready to learn them systematically. In the comments area, he replied to netizens' guess that he was going to take the jewelry appraiser certificate. In addition, he praised Cheng Yi for being humble in the comments section.