In the early 1970s, a bowl of mutton steamed buns cost 5 cents (one pancake, two taels of food stamps, and 5 cents. The standard was two pancakes and one portion of mutton).
In the early 1990s, pricing was graded, with prices ranging from 20 to 30 yuan.
40 yuan a serving is not expensive nowadays. A bowl of noodles at the airport costs 36 yuan.