You have been granted access, use your keyboard to continue reading.The West Lake in Hangzhou, China. The city has become a hub for artificial intelligence start-ups, helped along by government subsidies and tax breaks.Credit...Qilai Shen for The New York TimesAs China vies with Silicon Valley for primacy, Hangzhou, home to DeepSeek and Alibaba, is where its aspiring tech titans mingle and share ideas.The West Lake in Hangzhou, China. The city has become a hub for artificial intelligence start-u...