In China, it's Mandarin. Cantonese is mostly mostly dominant and safe in Hong Kong. It is the language of Guangdong Province (Canton) however, it's being slowl

In China, it's Mandarin. Cantonese is mostly mostly dominant and safe in Hong Kong. It is the language of Guangdong Province (Canton) however, it's being slowly phased out by government efforts [1][2] and by demographics (it's where all the factories are – it attracts Mandarin speakers from rest of China who go there to work and, recent trend, they're starting to settle there). [1] http://www.businessinsider.com/china-is-forcing-its-biggest-cantonese-speaking-region-to-speak-mandarin-2014-8 http://www.businessinsider.com/china-is-forcing-its-biggest-... [2] https://blogs.wsj.com/chinarealtime/2010/07/26/clash-over-mandarin%E2%80%99s-ascent-in-guangdong/ https://blogs.wsj.com/chinarealtime/2010/07/26/clash-over-ma...