Basement dining rooms must work hard to get noticed, and China Tang works harder than most in that department: down in the lower regions of The Dorchester, no inch of the restaurant goes unembellished. The inspiration is interbellum Shanghai, and while the dark wood and elaborate carpets aren’t looking box-fresh, it’s certainly an atmospheric way to kit out a dining space. China Tang’s food is straight-down-the-middle Cantonese, handled with care and served with a level of ceremony that suits the luxe hotel surroundings. To start, try delicate tomato and egg-drop soup, followed by golden prawns with salted egg yolk, stir-fried minced pigeon in lettuce wraps or, for a bit of fire and fragrance, fish braised with Szechuan peppercorns. Tang’s international clientele believe there’s no bad time for dim sum, so expect Shanghai dumplings, mango rolls, turnip cakes and roast pork buns right through the day. In the bar, the same menus are offered, along with fashion-forward cocktails.