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mudkip China is Apple’s largest-growing market, and Mountain Lion offers improved Chinese text input with better prediction and autocorrection, the ability to include English characters without switching keyboards, and improved handwriting recognition for Chinese characters. There’s also a number of new Chinese services integrated in Mountain Lion, including the Baidu search engine, the Sina weibo blogging service, the Youku and Tudou video services, and the QQ, 126, and 163 mail services.
http://www.theverge.com/2012/2/16/2801047/mac-os-x-10-8-mountain-lion-preview-photos-video