A staff member (L) explains garbage sorting to visitors at a community center in Haidian District, Beijing, capital of China, April 30, 2020. (Photos: Xinhua)

A community worker (R) explains to local residents about garbage sorting in Haidian District, Beijing, capital of China, April 30, 2020.

A visitor learns about garbage sorting at a community center in Haidian District, Beijing, capital of China, April 30, 2020.

A local resident learns about garbage sorting in Haidian District, Beijing, capital of China, April 30, 2020.

Visitors learn about garbage sorting at a community center in Haidian District, Beijing, capital of China, April 30, 2020.

A visitor interacts with a robot to learn about garbage sorting at a community center in Haidian District, Beijing, capital of China, April 30, 2020.

A local resident checks a model of a garbage bin in Haidian District, Beijing, capital of China, April 30, 2020.