The Hungry Ghosts Festival (Yu Lan Festival) is on the 7th month in the Chinese lunar calendar. According to ancient Chinese beliefs, the gates of the hell are open during this month, unleashing the spirits and ghosts. Apart from other worshipping ceremonies and offerings, chinese opera is performed as entertainment for ghosts, gods, and human beings. In Hong Kong, open celebratation is usually organised and done by the Chaozhou (Chiu Chow) groups. Chaozhou opera, one form of traditional chinese operas, was performed on a temporary stage constructed of bamboo scaffolding in a football playground of Ngau Tau Kok District. The opera lasted for a few days.