How often does the train push in snack car?

The train snack car pushes every half hour. According to the ppt remittance inquiry, the train snack trolley basically runs every half hour. So the train snack car pushes every half hour. A small dining car is usually pushed on the train to sell cigarettes, alcohol, snacks, fruits, lunch boxes and so on. The high-speed rail only has a special dining car to sell things, including drinks, lunch boxes and snacks, but the price is relatively high. In a single row of 8 cars, the dining car is in the No.5 car, while in the case of double car reconnection (16 cars), No.5 and 13 cars are dining cars.