'Beijing Folds') is a science fiction novelette by the Chinese writer Hao Jingfang.

[3] In April 2017, Hao announced that Folding Beijing was to be adapted into a movie titled Folding City,[4] produced by Chinese film production company Wanda Media[5] and directed by Josh Kim.

To make enough money for his adopted daughter Tangtang's kindergarten tuition, Lao Dao accepts this job.

After he manages to arrive the first class, he finds that Yi Yan is actually a married woman, who offers Lao Dao more money to hide this fact from Qin.

Lao Dao accidentally finds that the whole waste processing industry, the main economic pillar of the third world, can be easily replaced by technology – and it is only kept in order to provide jobs for those third class people.