Aerial photo shows the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Nov. 15, 2018. The Chinese government will invest 300 million yuan (US$44.9 million) in the next 10 years in its greatest efforts of protection and utilization of ancient documents in the Potala Palace, a World Heritage site in Lhasa, southwest China's Tibet Autonomous Region, according to the management office of the Potala Palace. [Photo/Xinhua]