I have a bunch of relatives there, so I’d go where they took me for Chinese food or recommended when they left their second homes for my use when they returned to Hong Kong on trips.
With that kind of food, chefs are key and they switch restaurants a lot, so I go where my family recommend at a given time. Many Chinese chefs are proprietary and often don’t share their recipes, special techniques and such. Chinese folks also are very entrepreneurial, so often chefs will open up their own places, co-own or such, and when the restaurant fails or someone has a falling out, the chef moves again.
I haven’t been back to Vancouver since before the pandemic and I moved away from the Pacific Northwest several years ago, so it hasn’t been as convenient to visit. I hope to revisit Vancouver maybe next year, because I’m booked up this year.
If you live in the area, I’d say ask Chinese acquaintances whom you trust taste wise. And it helps to know what part of China they’re from, because it’s a large country, with different cuisines. Like dim sum comes from Southern China, so I wouldn’t ask a Northerner unless I knew they knew dim sum well.
If you like pure, clean, subtle tastes, ask a Southerner. If you like spicy, bold flavors, ask a Northerner. Northerners also are the ones who traditionally ate a lot of noodles and buns. Southerners are big on rice. So if there are certain dishes you prefer, ask accordingly. Typically, Westerners like more robust flavors and might find Southern Chinese food bland. Taiwanese food is typically closest to Northern Chinese. (Southern China had the benefit of fresh ingredients and seafood, so they didn’t glop on seasoning, sauces or peppers to hide so-so ingredients.)
Richmond was especially good for Chinese food — many restaurants and shops catering to Chinese folks, especially from Hong Kong. We could go visit malls and such where you could speak only Chinese.