Wikipedia
Dajiao
Dajiao, called the Taiping Qingjiao or Taipingqingjiao in Hong Kong, is a Taoist ritual and festival which is performed every year.
The ritual is for asking the Taoist deities peace and rest in that area. Pak Tai is a common Chinese god for this festival. Believers must eat vegetarian at the festival. It is performed across Greater China: Sichuan, Fujian, Taiwan, Guangdong and Hong Kong.