Update 1: iOS 5 Final version has been released for Download and Jailbreak - Click Here
It has been discovered in iOS 5 beta 2, that it brings added, additional support for a variety of Chinese email services. iOS 5 beta 2 was released yesterday by Apple for developers and already many of the findings and discoveries are being reported about.
iOS 5 now brings support for China’s QQ, 163.com, and 126.com email services, similarly how MobileMe and GMail services are supported by iOS on iPhone, iPad and iPod touch. The reason why Apple is concentrating more towards China may be that China is a huge potential market for the company, and that they would have to offer local services to attract potential consumers.
We have also heard that Apple is meeting with higher-ups at China Mobile, the country's state operated mobile network, for negotiations regarding iPhone 5 release, which a China Mobile worker has claimed to be this September.