As of now, there are no details regarding the third sub-brand, but there will be having a top celebrity as brand ambassador.
With that, we also got the glimpse of the first phone from the new sub-brand.From the above image, we can see all metal back with a LED flash beside the Dual camera setup.The design of the camera is similar to OnePlus 5 and also the U-shaped Antenna bands running top of the device.
The new Sub-Brand devices will be exclusively sold offline only. It is too late for Xiaomi to enter the offline markets as already Oppo and Vivo are present with their great marketing strategy and selling a huge number of devices.So we have to wait for few more days we might expect the third sub-brand devices to launch in China by end of July.