The Hani are an ethnic minority who, like the Naxi , are believed to descend from the Qiang people that migrated from the Tibetan plateau prior to the 3rd Century AD.  The Hani primarily live in the mountainous areas of southeast Yunnan.  The Hani's polytheistic religion includes ritual practice in order to gain the protection of different gods.  Their religious structure has three parts: the Zuima conducts main celebrations, the Breima conducts exorcisms and magical rituals, and the Nima carries out predictions and administers medicine.
 
Rituals are held regularly to worship Gods of Heaven, Earth, the Dragon Tree and their village, as well as their family patron gods. There are days devoted to animals, such as Sheep Day, on which sacrifices are made. On days when someone dies, a wild animal comes into the village, a dog climbs onto the roof of a house, or a fire breaks out, people will be called to stop working and hold ceremonies to avert misfortune.

They also celebrate the June Festival, which falls on June 24th. This is a happy occasion, especially for the young people. They sing, dance, play on swings and hold wrestling contests. At night, people in some places light pine torches while beating drums and gongs to expel evil spirits and disease.

Like many other ethnic minorities in China, the Hani can be identified by their unique and colorful attire. The Hanis prefer clothing made of home-spun dark blue cloth. Men wear front-buttoned jackets and trousers, and black or white cloth turbans. Women have collarless, front-buttoned blouses with the cuffs and trouser legs laced. Women in general like to wear earrings, silver rings and necklaces. 

See the Wikipedia entry on Hani people