It would likely take a lot of work to make a correct list of Chinese audio brands under your specifications. Not many audio consumers and also not many persons who are regular readers of ASR clearly know and distinguish what brands are Chinese. Oppo was, I believe, a Chinese brand by your terms. I would bet that many products branded and marketed by non-Chinese European, US and Canadian companies/labels are in fact relabeled Chinese product. Marketers, advertisers, retailers, resellers are masters of mixing and matching, and of obfuscating product origins, and of creating a fabricated nice patina to otherwise ordinary products. The same goes for automobile brands. Do Indian and Chinese corporations own plants across the globe and also own many brands once classically European or classically American?