Xinhua Bookstore can be said to be a state-owned enterprise. Its purchase channel is the cheapest from printers, and the logistics is also distributed by the company, so Xinhua Bookstore sells the highest price at the lowest cost. Therefore, although the sales volume is small, but the personal profit is high, naturally make money.
And many books can only be bought in Xinhua Bookstore. When students want to buy some supplementary teaching materials, many of them are only available in Xinhua Bookstore. Moreover, all schools contact the local Xinhua Bookstore and get the goods directly from the bookstore. Therefore, even if no one in the bookstore buys books, it is enough to eat school orders.
This is why people can only see Xinhua Bookstore and seldom see private bookstores.