Baidu.com will become the default homepage and search for the Microsoft Edge browser in Windows 10 for China.

Microsoft said it remains committed to delivering Bing around the world.
Microsoft also announced that Chinese smartphone company Xiaomi will adopt Windows Azure, operated by 21Vianet and based on Microsoft technology, to provide cloud services for Mi Cloud. Xiaomi also uses a domestic cloud platform operated by its sister company.
http://blogs.windows.com/bloggingwindows/2015/09/23/windows-10-in-china/