A latterday Rip Van Winkle who fell asleep in March 2000 and woke up this summer might conclude that the internet bubble had never burst – it had simply shifted from the US to China. This week, Yahoo handed over $1bn (¬£550m) cash and its assets in China in return for a 40 per cent stake in Alibaba, a local e-commerce portal. Earlier this month Baidu.com, the leading Chinese search engine, soared 350 per cent on its Nasdaq debut, and now trades at more than 2,000 times earnings.