U.S. rules curbing the export of artificial intelligence chips to China are beginning to squeeze the country’s AI industry. And companies ranging from behemoths like Alibaba to rising startups like Moonshot AI are all grappling with the impact.After Chinese online video giant Kuaishou unveiled a test version of Kling, its text-to-video AI model similar to OpenAI’s Sora, so many people rushed to sign up for the trial that Kuaishou had to limit the number of people who could use it to avoid runnin...