Monks attend an event at the Jokhang Temple in Lhasa, capital of Southwest China`s Tibet autonomous region, Dec.21, 2019. 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. [Photo/Xinhua]

A man lights butter lamps at the Jokhang Temple in Lhasa, capital of Southwest China`s Tibet autonomous region, Dec.21, 2019. [Photo/Xinhua]

A monk lights butter lamps at the Jokhang Temple in Lhasa, capital of Southwest China`s Tibet autonomous region, Dec.21, 2019. [Photo/Xinhua]

Monks attend a Butter Lamp Festival event at the Jokhang Temple in Lhasa, capital of Southwest China`s Tibet autonomous region, Dec.21, 2019. [Photo/Xinhua]

Monks attend a Butter Lamp Festival event at the Jokhang Temple in Lhasa, capital of Southwest China`s Tibet autonomous region, Dec.21, 2019. [Photo/Xinhua]

Monks light butter lamps at the Jokhang Temple in Lhasa, capital of Southwest China`s Tibet autonomous region, Dec.21, 2019. [Photo/Xinhua]

A monk lights butter lamps at the Jokhang Temple in Lhasa, capital of Southwest China`s Tibet autonomous region, Dec.21, 2019. [Photo/Xinhua]

Monks attend a Butter Lamp Festival event at the Jokhang Temple in Lhasa, capital of Southwest China`s Tibet autonomous region, Dec.21, 2019. [Photo/Xinhua]