First, a warning; this Chinese spot is walk-in only and often has long queues - so it’s best to get there as close as possible to opening times (that's 12pm for lunch, then 6pm for dinner).
Once inside, feast like there's no tomorrow on their particularly plump hargau (prawn dumplings) and huge xiaolongbao (soup dumplings) alongside a delicious array of Cantonese classics, including roast duck, beef ho fun (flat noodles) and charred salty green beans with minced pork.
Those queues are there for a reason.