Aerial photo taken on Sept 23, 2019 shows a view of Nuorilang Waterfall 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/Xinhua]

Aerial photo taken on Sept 23, 2019 shows a view of Nuorilang Waterfall 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/Xinhua]

Aerial photo taken on Sept 23, 2019 shows a view of Nuorilang Waterfall 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/Xinhua]

Aerial photo taken on Sept 23, 2019 shows a view of Nuorilang Waterfall 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/Xinhua]

Aerial photo taken on Sept 23, 2019 shows a view of Nuorilang Waterfall 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/Xinhua]