STORY: China has tightened controls on imports of American chips, including those made by Nvidia.This is according to a report in the Financial Times on Friday.It cites sources as saying customs officials have been sent to major ports to conduct strict inspections.The move comes as Beijing intensifies its focus on promoting local semiconductors.According to the Financial Times, the controls initially focused on Nvidia chips intended to comply with US restrictions on exports to China.But he says they have since been expanded to cover all advanced semiconductor products that could violate those restrictions.China’s access to Nvidia’s world-leading chips has been a major source of tension between Washington and Beijing.The Financial Times says at least $1 billion of the company’s advanced silicon was smuggled into the country in the three months since May.This contrasts with the supposedly tepid demand for a chip design that Nvidia can sell there.While Huawei and other local companies have made progress in recent years, Reuters sources at Chinese technology companies say American chips are still considered to perform better.In August, Donald Trump raised the possibility of allowing Nvidia to sell its most advanced products in China again, but there has been no news of an official policy change since then.