Shoton Festival "Shoton" in Tibetan means sour milk banquet. As Tibetan operas are performed and Buddha paintings are exhibited at this time, it is also called "Tibetan Opera Festival" or "Buddha Exhibition Festival." The traditional way of starting the Shoton Festival is to show Buddha paintings. The main contents include Tibetan operas and gala parties, as well as wonderful yak racing and horsemanship display. The Shoton Festival starts on the 30th day of the 6th month according to Tibetan calendar and lasts five days. The Gelug Sect regulates that between April and June according to Tibetan calendar, Lamas can only practice Buddhism in monasteries to avoid treading and killing tiny lives. The ban will be lifted at the end of June. At that time, all lamas go out of monasteries and the laymen will offer them sour milk and perform Tibetan operas for them. After 1642, the Gandain Phodrang (Paradise Palace) of the Drepung Monastery became the political, religious and cultural centre of Tibet. Tens of thousands of people rushed there to give sour milk to lamas and ask for blessings. The Tibetan Opera troupes and wild yak dancing troupes all came to perform. In this way, the Shoton Festival is formed.