Agree with Silvia and Ben Li to use the word "plaza". But,I have not been to 上海华源世界广场. If the setting looks like the "Time Square" in New York, I would suggest to use "Shanghai Huayuan World Square". It seems to me that Plaza is more indoors, and a square has to be outdoors. But "Time Square" is not really a square, it is very tiny and surrounded by many tall buildings.