At night, in a public square near the Beijing Bird’s Nest stadium, two lines of mainly middle-aged women are dancing. They are dressed in sparkly red dresses of different designs, and waving colorful scarves in the air with their right hands. All around them are other people also enjoying the evening—walking, riding bikes or mopeds, pushing strollers, or sitting on benches and chatting.

Untitled (Beijing), by Arend Kuester (CC BY-NC 2.0)