China Wok took a food order around 6:15 p.m. for an apartment in M building, but when the 38-year-old deliveryman arrived, he was confronted by three men wearing black coats and stocking caps, police said.
Deliveryman Ai Qiu Lin told police one of the males pointed a black handgun at him and demanded his money.
Lin gave the robbers $400 and ran from the area.
The deliveryman told security at the front gate what had happened. The guard at the complex told police he spotted a 17-year-old girl, often mistaken for a male because of her short hair, wearing a black coat and black stocking cap just after the incident near M building.
The security guard told police the girl and an unknown male jumped the fence and ran away when they spotted him.