Some local students in Shenzhen spend 15000 a year, which is quite normal. Let's talk about living expenses.
But some don't spend money with these people. It is normal to live on 4000 yuan a semester.
Tuition fees are basically the same in the whole country, and deep dining halls are not very expensive. You can usually eat it for 5 yuan.
Anyway, the consumption in Shenzhen is much higher than that in Wuhan, Jiangxi, Hunan and other places, and food alone is expensive. If you want to join a club, buy some clothes, daily necessities and so on.
4000 yuan a semester is the basic budget.
If it helps you, please adopt it.