Yuxi cakes have always enjoyed a high reputation in the province, among which products such as candied fruit series were all the rage in Kunming, the provincial capital. Lanxinzhai, a famous candy restaurant in the north of the city, which produces crystal preserves, sand cakes and cakes (commonly known as sugar cakes), is an early household. Lanxinzhai was founded by Li Guojun's father in 1914. At the beginning, it was a small business, and only making sugar food could not maintain the family's life, so Li Guojun's mother and sister had to engage in hand weaving. Gradually, due to the good quality and moderate price of sweets produced by his family, the market was opened, and the variety and quantity of cakes produced also increased. By 1944, "Lanxinzhai" had developed into a leading sugar producer in the North City, with certain fixed assets. With the expansion of production, relying on one's own labor can no longer meet the needs of production development, and immediately hired 8 masters and long-term workers. At that time, the business was very good. Every day, we could sell 2 kilograms of miscellaneous sugar, thousands of glutinous rice cakes and more than 3 sugar cakes. In addition, we could also sell a certain number of well-known crystal preserves, mountain red (made of mountain fruit) and assorted south sugar. In 1945, due to the expansion of business, Li Guojun and his brothers split up, and the names of the stores were divided into Lanxinzhai Junfen Zhuanghe and Lanxinzhai Baofen Zhuanghe, which produced sugar and food with a vegetarian diet, Junfen Zhuanghe vegetarian diet and Baofen Zhuanghe vegetarian diet.

Lanxinzhai is not only the name of the store, but also the brand name of the products it produces. It was registered in about 1945 and established the first registered trademark in North City. Thanks to the registered trademark, Lanxinzhai's crystal preserves are exported to Shanghai and Hong Kong at home, and exported to Myanmar, Thailand and other places abroad, which are favored by customers. Crystal candied fruit is the main product for export. The big candied fruit is made of wax gourd and brown sugar or white sugar, with fine workmanship. When cut, it is red coral color, crystal clear, and has good color, fragrance and taste. In particular, the crystal candied fruit uses fine spices and exquisite materials, and the special wax gourd hat is refined through more than ten processes. The candied fruit is transparent like crystal stone, which is particularly sweet and crisp, slag-free and storage-resistant. It is said that it also has the effects of moistening lung, promoting fluid production and relieving cough.

in 1945, the two branches closed down due to the difficulty of capital turnover. In 1956, it was merged into a public-private partnership. Li Guojun and Li Guobao passed away in 196.