During the summer vacation, I went to a classmate's home to play in Yanbian. From the perspective of many people in big cities, they are very poor there. Apart from doing some border trade, they only work as civil servants and public institutions. My classmate's sister is a teacher and her monthly income is only 300 RMB. On the first day, he took me to eat Yanbian cold noodles. A large bowl was only 3 yuan, but based on the combined consumption ratio, it was equivalent to a meal of 500 yuan for a middle-class Shanghainese person. After I came back, I understood why my classmate got a scholarship, worked hard (and to avoid being discovered by the professor, because you can't work after getting a scholarship), and only slept 4 hours a day. I used to say that she was crazy about money and didn't care about her health. Now I understand that it was because she didn't want the rest of her family to continue to live a miserable life and be afraid of poverty. Her next step is to get everyone in her family out of that place, so she needs to have a lot of money