The Biden administration is preparing to tighten export regulations on AI chips to China, targeting loopholes that have allowed companies to circumvent restrictions. The new rules, expected to be unveiled this week, will require companies to report shipments of certain chips. Last year, restrictions prevented Nvidia Corp from shipping two of its most advanced AI chips to Chinese customers, but the company released less advanced variants to circumvent the controls. The updated rules will also require companies to notify the government about semiconductors whose performance is slightly below the guidelines before they are shipped to China.