Photo taken on Sept 27, 2016 shows Sang Lei (L) helping his student arrange daily articles 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 27, 2016 shows Sang Lei (L) helping his student arrange daily articles at Pengdang Primary School, in Nujiang Lisu autonomous prefecture of Southwest China's Yunnan province. (Photo/Xinhua)
