5-10 years ago, hk was still the go-to place for my family if they wanted name brand things, short of coming to the US. Now, they come to the US or even Japan if they don't stay in the country.
Recently I was in Chengdu (which is not tier 1) and the sheer number of luxury brand stores in the IFS building shocked me. That isn't even counting the surrounding shopping center that also carry similar luxury brands. It certainly at least is on par with hk shopping.
Many in the west still view china through the same lens as they did 10 years ago, and that is wildly inaccurate.