Potted dishes generally refer to all kinds of dishes pickled in ceramic (and glass) jars. Generally speaking, jar dishes are more popular in the south than in the north. Pot dishes are an ancient specialty, crisp, salty, spicy, sour and sweet. Rich in nutrition, easy to stimulate appetite. Pot dishes originated in ancient times, and fresh vegetables were sealed in clay pots for emergencies. After thousands of years of oral teaching and innovation, Tanzi cuisine has developed into a local specialty dish with unique flavor and various varieties, and Bulu pepper is one of the Tanzi dishes. At present, in the process of making capsicum and other altar vegetables, a lot of salt or other antiseptic additives are added to prevent vegetables from rotting and deteriorating prematurely. Salt contains impurities such as nitrite and nitrate, which may produce harmful substances such as nitrite. Additives contain some dangerous substances harmful to human health, which is not good for human health. In addition, in the existing pepper production process, the raw materials are easy to change color, especially black, which directly affects the product quality.