A volunteer illustrates the knowledge of garbage sorting to the local residents in Qinhuangdao, North China’s Hebei province, June 4, 2019. Various activities are held across the country to raise people’s awareness of garbage sorting and help them develop the habit of waste classification.[Photo/Xinhua]

A volunteer illustrates the knowledge of garbage sorting to children in Hefei, East China’s Anhui province, June 4, 2019. Various activities are held across the country to raise people’s awareness of garbage sorting and help them develop the habit of waste classification. [Photo/Xinhua]

Pupils take part in a garbage-sorting game at an elementary school in Handan, North China’s Hebei province, June 4, 2019. Various activities are held across the country to raise people’s awareness of garbage sorting and help them develop the habit of waste classification.[Photo/Xinhua]

Students make garbage sorting posters in Xingtai, North China’s Hebei province, June 4, 2019. Various activities are held across the country to raise people’s awareness of garbage sorting and help them develop the habit of waste classification. [Photo/Xinhua]

Pupils display the learning materials of garbage sorting at an elementary school in Xingtai, North China’s Hebei province, June 4, 2019. Various activities are held across the country to raise people’s awareness of garbage sorting and help them develop the habit of waste classification.[Photo/Xinhua]

Pupils learn the knowledge of garbage sorting at an elementary school in Xingtai, North China’s Hebei province, June 4, 2019. Various activities are held across the country to raise people’s awareness of garbage sorting and help them develop the habit of waste classification.[Photo/Xinhua]

Pupils take part in a garbage-sorting activity at an elementary school in Binzhou, East China’s Shandong province, June 4, 2019. Various activities are held across the country to raise people’s awareness of garbage sorting and help them develop the habit of waste classification.[Photo/Xinhua]