Photo taken on Sept 26, 2016 shows Sang Lei talking with his students during class break at Pengdang Primary School, in Nujiang Lisu autonomous prefecture of Southwest China's Yunnan province. (Photo/Xinhua)
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Photo taken on Sept 26, 2016 shows Sang Lei talking with his students during class break at Pengdang Primary School, in Nujiang Lisu autonomous prefecture of Southwest China's Yunnan province. (Photo/Xinhua)
