A month in 200 yuan. On average, it costs more than 6 yuan a day. There's enough pressure. You'd better learn to cook simple meals, make full use of resources at home, such as rice, noodles and oil, and buy steamed bread from 2 yuan, vegetables from 2 yuan or cook some noodles every day. Cooking some simple meals at home can certainly be done. If you only buy food without cooking, 400 yuan is really tight unless you eat more instant noodles.