The 100-year-old market is a famous event which is held once every year. Both men and women dress in their most beautiful outfits and head to Khau Vai market on the 27th day of the third lunar month annually. The market serves as a place for locals to find lovers, give ex-lovers the chance to meet each other again, and offer traders the opportunity to exchange agricultural products. The market is now organised within the framework of the annual Khau Vai Culture and Tourism Week, which often lasts for three days with assorted cultural activities, in order to attract more visitors to Ha Giang province./.