Aerial photo taken on March 8, 2018 shows the Changhai scenic area in the snow in Jiuzhai Valley in southwest China's Sichuan Province. Part of the UNESCO World Heritage Site Jiuzhai Valley reopened on March 8 after a magnitude 7 earthquake struck the popular tourist destination in August 2017. (Xinhua/Sang Ji)

Aerial photo taken on March 8, 2018 shows the Wucaichi scenic area in the snow in Jiuzhai Valley in southwest China's Sichuan Province. Part of the UNESCO World Heritage Site Jiuzhai Valley reopened on March 8 after a magnitude 7 earthquake struck the popular tourist destination in August 2017. (Xinhua/Sang Ji)

A guide introduces the Changhai scenic area to tourists in Jiuzhai Valley in southwest China's Sichuan Province, March 8, 2018. Part of the UNESCO World Heritage Site Jiuzhai Valley reopened on March 8 after a magnitude 7 earthquake struck the popular tourist destination in August 2017. (Xinhua/Sang Ji)

Tourists visit Changhai scenic area in Jiuzhai Valley in southwest China's Sichuan Province, March 8, 2018. Part of the UNESCO World Heritage Site Jiuzhai Valley reopened on March 8 after a magnitude 7 earthquake struck the popular tourist destination in August 2017. (Xinhua/Sang Ji)