Xinyuanzhai sour plum soup is a traditional medical and health food in China. According to the method of Qing Palace Imperial Restaurant, it is unique and popular. Every summer, the store sells sour plum soup in the store with a special wooden refrigerator. Celebrity calligraphy and painting are hung in the business room, and there are tables and chairs. Many literati loiter in the cultural street, watching and buying antique calligraphy and painting, and are also willing to come to the elegant shop in Xinyuanzhai to drink a bowl of sour and sweet sour plum soup, which is cool and refreshing, so as to cool off the heat and take a nap. Foreign scholars and overseas Chinese often entrust people to buy or mail sour plum cakes for fun.

The sour plum soup in Xinyuanzhai is generally stored in a pot of blue-and-white porcelain with a big belly, surrounded by natural ice. Porcelain jars and natural ice are packed in wooden cases, which are nailed with tinplate and painted with paint.

The choice of raw materials for making food in this shop is very strict. For example, sour plum soup, sour plum cake, etc., choose high-quality ebony produced in Zhejiang, Fujian, Guangdong and other places, especially the round ebony produced in Ji 'an, Zhejiang, which has a small core and thick meat. The auxiliary materials are golden rock sugar and osmanthus fragrans produced by Zhang Changfeng or Zhang Fengyu in Hangzhou. Preserved begonia is made of "eight-edged" Bai Haitang, and white sugar is made of "top-layer" soft white sugar. In production, adhere to the formula and operate strictly according to the rules. The ingredients for making sour plum soup should be mastered flexibly according to the temperature. It should be sour when it is hot and sweet when it is cold. The method is: soaking at constant temperature, filtering, heating, and adding auxiliary materials such as osmanthus fragrans and rock sugar. Sour plum soup should be golden in color, fragrant and refreshing, and hung in a bowl after drinking (a layer of soup is attached to the bowl). After making sour plum soup, it is concentrated and processed into sour plum halogen, which meets the requirements of black, red and transparent color, rich floral fragrance, sweet and sour taste. The method of candied haws is more unique. Choose the best red fruits, remove the core and string them into a string, but leave a certain gap between the fruits so that each red fruit is evenly stained with rock sugar. Some also cut a hole in the fruit, put in homemade fine bean paste, walnut and yam paste, thinly paste a layer of black bean paste on the outside, put different shapes of white melon kernels on the bean paste, and then dip in ice sugar juice. The appearance is red, white and black, and the food is sweet, sour and crisp, fragrant and delicious.

Xinyuanzhai Beverage Company, since its establishment, has inherited and strictly followed the traditional technology and secret recipe, and combined with modern scientific methods to produce products that are deeply loved by consumers. In the process of making sour plum soup, it is a 100% pure natural drink, which is fully enclosed, sterile and hot-filled, without adding any additives and preservatives. Using high-tech methods, not only the pure taste of the product is retained, such as the rich sweet-scented osmanthus fragrance and the unique burnt fragrance of ebony, but also the unique role of ebony in drinks is ensured. It is a real national traditional beverage integrating health preservation, health care and drinking.

In the production process of Qiuli ointment, the company solved the contradiction that the molecular structure of honey and rock sugar can't be mutually dissolved at high temperature by using high-tech means, so that the four main raw materials of Qiuli, honey, rock sugar and fresh ginger gave full play to their important functions of relieving cough, moistening lung and preventing colds, and enjoyed a good reputation in the same industry.

At the end of 2004, the company passed the international quality certification system ISO900 1-2000 standard and the certification of all products market access system, which truly realized the combination of traditional time-honored brands and international quality system management. It has experienced tests and progress in raw material procurement, production technology and food hygiene and safety.