Microsoft’s racist chatbot returns with drug-smoking Twitter meltdown

    This isn’t the first time Microsoft has launched 
    public-facing AI chatbots. Its Chinese XiaoIce chatbot 
    successfully interacts with more than 40 million people 
    across Twitter, Line, Weibo and other sites but the 
    company’s experiments targeting 18- to 24-year-olds in 
    the US on Twitter has resulted in a completely different 
    animal.

I guess in China the state regulates internet so that Microsoft's bot has a free supervisor.