Ask HN: How do we get our app on Chinese app stores? 12 years ago
Off the top of my head, Just take the direct route, create an app download site, have it translated to Mandarin (or Cantonese if your main interested user base is located towards Guangzhou, Hong Kong Macau, etc) and start advertising it by whatever means you can on Chinese websites. If you can get some quality reviews from existing Chinese users you'll build enough credibility for people to download from your mobile site.
You might also want to research what Chinese App marketplaces do exist. Google Play surely isn't the end of the known Android App world.