On 20th, I sent something from Chongqing to Leshan, Sichuan by ZTO Express. Why does the mail go to Jinhua transfer station?

It's normal, maybe one thousandth! I will send it to you again in a few days. Your express will travel all over China. Express delivery is also sorted by person. There are always mistakes. For example, I often send it to Yulin, Guangxi, and every courier company will send it to Yuhuan, Taizhou. This is definitely not fooling you. Many courier companies have it, so your address must be clear! Otherwise, it is wrong to give other cities similar names.