Very fresh chicken essence, soy sauce and oyster sauce will make soup astringent because the salt content will increase, so you will not be able to eat the taste of the ingredients themselves and become astringent. Oyster sauce is fragrant and fresh. Light soy sauce and extremely fresh flavor are used for refreshing and seasoning. Old soy sauce is used for coloring, but they are all salty, with high salt content. If they are too salty, they will be astringent, so making soup together will make the soup taste too strong and astringent.