As a regional product, Sichuan bean paste can go to the whole country and become one of the commonly used seasonings, which is inseparable from the promotion of Sichuan cuisine.
 
"Traditional craft" is another selling point of bean paste, Sichuan bean paste industry basically refers to the bean paste industry in Pi County, Sichuan, Pi County is the birthplace of bean paste, with a history of more than 300 years, the vast majority of bean paste production enterprises are concentrated here, it is believed that it can produce the most authentic bean paste, and its production skills became a national intangible cultural heritage in 2008.
 
At present, there are two products of Pixian Douban on the market, one is Pixian Douban, also known as old Douban, and the other is red oil Douban. The former is the traditional Douban that has been handed down to this day, but there are only a handful of large manufacturers in Pixian County that are still making old Douban, and high-quality old Douban products have become a symbol of brand strength and status, among which Juancheng is a well-deserved leading brand. Juancheng brand old douban is produced by Sichuan Pixian Douban Co., Ltd., formerly known as one of the three major sauce gardens during the Qing Dynasty, is the earliest commercial bean paste producer, after 1956 public-private partnership and 1999 share restructuring, and finally achieved the largest Pixian Douban state-owned enterprise today.
 
According to the production standards, Juancheng brand old douban is divided into special five-year system, special three-year system, and first-class one-year old watercress according to the production standard, and there is no fermentation time in the product classification, but it is generally believed that the longer the fermentation time, the stronger the sauce ester aroma.
 
Juancheng brand 5-year-old watercress is the top product in the industry, using the traditional vat brewing method, the fermented chili embryo and broad bean paste are mixed into the clay jar, and the daily artificial sunning dew lasts for 5 years, and the color is dark reddish-brown. There are only four ingredients in this aged watercress production: broad beans, chili peppers, edible salt, and wheat flour. After fermentation, the bean paste becomes oily and shiny, the price is higher, 500g is about 550 yuan, if measured by the positioning of condiments, the 5-year bean paste has surpassed its practical value, generally not used for daily household use, is a special sauce for high-end restaurants and gifts. Juancheng brand three-year douban also meets the special standard, with less moisture, rich sauce and fresh fragrance, and the price is relatively cheap, with a price of 50 yuan for 1000g.
 
The old bean paste has to be fermented for a long time, and the production process of red oil bean paste is not so complicated, and the production cost is lower. In addition to the four major raw materials, rapeseed oil and spices will be added for seasoning, the price is affordable, 500g is only 8.9 yuan.
 
In actual use, red oil watercress emphasizes the effect of rapid coloring, and the old watercress must be fried with oil, and the red oil watercress of Sichuan vegetables can be cooked daily.