Villager Zhang Yukui cleans garbage bins in Xiaomiaozi Village of Damiao Township in Chifeng City, north China's Inner Mongolia Autonomous Region, July 16, 2019. (Xinhua/Liu Lei)

Technician Wang Chenglong (R) shows the rubbish classification system to villager Zhang Yukui in Xiaomiaozi Village of Damiao Township in Chifeng City, north China's Inner Mongolia Autonomous Region, July 16, 2019. (Xinhua/Liu Lei)

Villager Zhang Yukui transports garbage bins in Xiaomiaozi Village of Damiao Township in Chifeng City, north China's Inner Mongolia Autonomous Region, July 16, 2019. (Xinhua/Liu Lei)