Popular carbon frame manufacturers from China include Yeoleo, Trifox, Winspace, OG-Evkin. These brands put their Logos on the bikes and stand by their warranties. You can also include Seraph (TanTan), as they have lately been selling frames with their logos. There are also companies like Carbonda, VeloBuild, LightCarbon, that produce open mold frames with warranties as well. Have a look around the forum and you will see various builds by different companies (as well as reviews and comments on customer service). I personally ordered from Carbonda (CFR 1056 due to the geometry and BSA BB) and I'm pretty happy with their communication.