Aerial photo taken on Sept. 23, 2019 shows a view of Lake Xiniuhai in the Jiuzhaigou National Park in southwest China's Sichuan Province. Part of the Jiuzhaigou National Park in southwest China's Sichuan Province will reopen to visitors on Friday on a trial basis, over two years after it was hit by a powerful earthquake, local authorities said Monday. (Photo by Wang Xi/Xinhua)