Tricholoma and Chaigoubao bacon have a long history.

1. Tricholoma is a kind of white mushroom that grows on Mongolian grassland. It usually grows in places with sheep bones or sheep dung, and it tastes extremely delicious. Because the local products of Tricholoma mongolica were previously exported to the mainland through Zhangjiakou City, Hebei Province, Zhangjiakou is a distribution center for Mongolian goods, so it is called "Tricholoma mongolica". It is still the most expensive mushroom in China market because of its low yield and high demand.

2. Chaigoubao bacon is a famous cooked meat product, and it is a specialty of Chaigoubao Town, Huai 'an County, with a history of more than 200 years. Smoked with cypress, it is bright in color, light and not greasy, and has a unique taste. The main varieties are smoked pork (pork belly, pig head, ribs and water), smoked mutton, smoked chicken, smoked rabbit meat and smoked dog meat. Bacon named "Xi" is the most famous. During the Qianlong period of the Qing Dynasty, there was a man named Guo in Chaigoubao Town, Huai 'an County who opened a bacon shop. He summed up the previous experience in making Chaigoubao bacon and created a unique production process, which doubled the value of Chaigoubao bacon. According to legend, when Eight-Nation Alliance invaded Beijing, Empress Dowager Cixi and Emperor Guangxu fled, they passed by Chaigoubao for dinner and enjoyed the bacon in Chaigoubao. Since then, it has been ordered as a tribute by the Empress Dowager Xi.