Chinese brands do the same QA just fine. There's nothing wrong with brands like Anker for example.
Xiaomi and Huawei make phones that are quite comparable in quality to any of the established western and Korean brands; Xiaomi also apply their brand to a lot of very good electronic stuff that's very good value - electric scooters, air purifiers, smart home equipment etc. Rigol and Aneng make consistently good test equipment at a fraction of the price of western equivalents. Japanese brands used to dominate the radio control hobby industry, but they have been almost completely displaced by Chinese brands.