Laochenggen is a place name located in Lianhu District, Xi'an City, Shaanxi Province, China. Here, you can taste a variety of delicacies, including:

1. Shaanxi specialty snacks: such as Roujiamo, Liangpi, Bingfeng, Mutton Steamed Bun, Taotaozi, etc.

2. Sichuan cuisine: There are many Sichuan cuisine restaurants near Laochenggen, such as Malatang, Chuanchuanxiang, boiled fish, Dandan noodles, etc.

3. Barbecue: There are many barbecue restaurants near Laochenggen, such as grilled mutton skewers, grilled beef skewers, grilled chicken wings, etc.

4. Hot pot: There are many hot pot restaurants near Laochenggen, such as Sichuan hot pot, Chongqing hot pot, self-service hot pot, etc.

5. Western food: There are also several Western food restaurants near Laochenggen, such as Pizza Hut, McDonald's, KFC, etc.

To sum up, Laochenggen is a food gathering place, where you can taste a variety of food to satisfy your taste buds.