Students at a primary school in Beijing take part in a garbage sorting promotion activity on March 4, 2018. (Photos: IC)

Local residents use QR code cards to open different bins for their garbage at a waste collection point in Shanghai, June 19, 2019.

Garbage classification inspector of Chongqing Environment & Sanitation Group Lu Xing (L) provides consultation service of garbage classification to a resident at a community in Jiulongpo district in Chongqing, Southwest China, June 27, 2019.

Kindergarten students learn to sort waste into four categories in a game in Rugao, Jiangsu province, earlier in June.

A staff member illustrates how to use the garbage sorting facility in Beijing, June 6, 2019.

A volunteer helps a resident throw a paper bag in Shanghai, June 4, 2019.