Is there any way to know what is the code name in the middle of the shenzhou bank number 135 in Zhengzhou? For example, the middle number of my mobile phone is 135(3 178).

This is a number field representing your region. The four digits in the middle plus the three digits in front are the so-called number segment. Nowadays, many middle four digits are named after the local area code. For example, Zhengzhou will use: 037 1, a kind of card, not only in China Bank, but also in sports.