This file photo taken in 2020 shows Pei Xiangjun and his team providing instructions on the usage of substrate soil for ecological restoration at the earthquake-hit area in Jiuzhaigou scenic area of southwest China's Sichuan Province. (Xinhua)
Jiuzhaigou National Park, a UNESCO World Heritage site famous for its spectacular waterfalls, lush forests and serene plateau lakes, was hit by a 7.0-magnitude quake on Aug. 8, 2017.
After the earthquake, a team led by professor Pei Xiangjun from Chengdu University of Technology carried out protection and restoration work of the natural heritage site. After years of post-quake reconstruction, the once scarred Jiuzhaigou has regained its glory.
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