Apple could still see a boost once it begins selling the new iPhones in China, which has been delayed by regulators.
Samsung holds 12 percent of the Chinese smartphone market, according to Canalys, behind Xiaomi's 14 percent share.
The company asserts that the higher end of the market is central to its success.
The Microsoft CEO's itinerary has not been disclosed, but the reason for his trip may be to delve a bit deeper into the antitrust investigation in China.
Following surprise spot check of Microsoft offices in the country last month, China raises new questions about the company's sales and distribution policy.
The new operating system is expected to launch initially on desktops in October, with support for mobile devices coming later.
Hundreds of Ouya games could soon be available on Xiaomi's streaming boxes and smart TVs.
Cristiano Amon, co-president of Qualcomm's chips segment, said in an interview that the rapid adoption of 4G LTE technology should benefit the company's growth in China.
The move is at odds with decisions by some other tech companies, most notably Google, to keep data out of China due to censorship and privacy concerns.
That's the word from China Mobile Chairman Xi Gouhua, who says that the company is looking in several areas to grow its business.