There are many methods, which can be referred to as follows: \x0d\ First, add more salt. Salt itself has antiseptic function, which can ensure that pickled food will not go bad for a long time. \x0d\ Second, keep it sealed. Avoiding contact with air is an important means. You can steam the Chili sauce on water and then cool it. The Chili sauce in the bottle becomes negative pressure and can be absolutely sealed. \x0d\ Third, use a clean and waterless spoon or chopsticks to get a proper amount of Chili sauce. Avoid using spoons and chopsticks with water marks or saliva to touch Chili sauce. Some bacteria will enter with saliva or water stains, leading to deterioration of hot sauce. \x0d\ Finally, put it in a cool place and keep it away from light. The reproduction of bacteria also needs suitable temperature, and avoiding direct sunlight can effectively hinder the reproduction of bacteria.