A sign tells customers how long they have to wait in line before they can order Friday outside the new Shake Shack in Beijing’s trendy Sanlitun neighborhood. Photo: Liu Xinyi/Caixin Global

Customers queue outside the restaurant. Photo: Liu Xinyi/Caixin Global

A man announces Wednesday that the Shake Shack is now open.

A server takes a tray of burgers to customers.

Customers leave with their purchases.

The line to order at the restaurant stretches around the building. Photo: Liu Xinyi/Caixin Global