In Shaanxi, there are "cured meat sandwiches" made of Baiji bun, "meat sandwiches" made of Baoji Xifu (vinegar in meat sandwiches), and Tongguan meat sandwiches made of Tongguan (different from Baiji bun, the appearance of the bun is brown, the stripes are clear, the inside is layered, the cake body is swollen, the skin is crisp and the inside is tender, the fire power is excellent, and the temperature is hot when eating, and the old Tongguan meat sandwiches are hot with cold meat, the cake is crisp and delicious, but not greasy).