Monks light butter lamps at the Jokhang Temple in Lhasa, capital of southwest China`s Tibet Autonomous Region, Dec. 2, 2018. People of the Tibetan ethnic group lit butter lamps and prayed through the night in the annual Butter Lamp Festival commemorating Tsong Khapa, a master of Tibetan Buddhism. (Xinhua/Purbu Zhaxi)

A monk lights butter lamps at the Jokhang Temple in Lhasa, capital of southwest China`s Tibet Autonomous Region, Dec. 2, 2018. People of the Tibetan ethnic group lit butter lamps and prayed through the night in the annual Butter Lamp Festival commemorating Tsong Khapa, a master of Tibetan Buddhism. (Xinhua/Purbu Zhaxi)

A monk is seen during the butter lamps lighting event at the Jokhang Temple in Lhasa, capital of southwest China`s Tibet Autonomous Region, Dec. 2, 2018. People of the Tibetan ethnic group lit butter lamps and prayed through the night in the annual Butter Lamp Festival commemorating Tsong Khapa, a master of Tibetan Buddhism. (Xinhua/Purbu Zhaxi)

A monk lights butter lamps at the Jokhang Temple in Lhasa, capital of southwest China`s Tibet Autonomous Region, Dec. 2, 2018. People of the Tibetan ethnic group lit butter lamps and prayed through the night in the annual Butter Lamp Festival commemorating Tsong Khapa, a master of Tibetan Buddhism. (Xinhua/Purbu Zhaxi)