In The First Cut Is the Deepest, Qing appeared to Izzie Stevens in the pit of Seattle Grace Hospital, waiting for sutures. Being Chinese and unable to speak English, she was unable to tell Izzie that she really wanted her to look at an illegal friend of hers who had sustained an injury to the head.
Eventually Izzie followed her outside and patched up Ahn. Before they left, Qing thanked Izzie.
She may have worked in the factory with Ahn.