There are two ways to do this. The first method is to soak pepper, pepper, star anise, platycodon grandiflorum and dried tangerine peel in warm cooking oil for two or three days, and the second method is to make incense. That is to say, add pepper, pepper, star anise, dried tangerine peel and platycodon grandiflorum into boiling water for about one day, and you can choose the method according to your personal taste.