Tired. The reason why the food delivery staff in Harbin isolation hotel are tired is that they need to wear protective clothing and masks to run back and forth to deliver food to the isolation hotel. Harbin, referred to as "Ha", is also called "Ice City". In ancient times, it was called Shangjing, Huining House, Alekin and Binjiang. It is the capital of Heilongjiang Province, a sub-provincial city and the core city of Harbin metropolitan area.