Hundreds of workers and volunteers carry paint buckets Tuesday at the Potala Palace in Lhasa, Southwest China’s Tibet Autonomous Region. Photo: He Penglei/China News Service

A worker paints the Potala Palace’s exterior during its annual renovation. Photo: He Penglei/China News Service

A worker paints the Potala Palace. Photo: He Penglei/China News Service

Workers prepare to whitewash the Potala Palace. Photo: He Penglei/China News Service

A worker pours white paint into a funnel. Photo: He Penglei/China News Service

The Potala Palace, which has 1,300 years of history, draws hundreds of thousands of visitors every year. It was included on the UNSECO World Heritage List in 1994.