They are all great, neck and neck. Chengdu Mathematics Sanyang is Yang, the head of mathematics in Shishi Junior Middle School, the vice president of Yulin Middle School, and a special math teacher in Chengdu. Chengdu, referred to as "Rong" for short, is also called Rongcheng and Jincheng. Chengdu, located in the middle of Sichuan Province, is the capital and sub-provincial city of Sichuan Province.