BYD electric buses Credit: DKMcLaren, Creative Commons Citing security concerns, the White House and Congress have been stepping up their efforts to restrict Chinese telecommunications and transportation companies from operating or selling goods in the United States. The moves come at a time when relations between the two countries have soured over the handling of the Covid-19 pandemic. President Trump on Thursday threatened new tariffs against China for its alleged cover-up of the outbreak before it spread globally. Tariffs have been the biggest weapon in the ongoing trade dispute between the two counties and remain in force on up to $370 billion in Chinese imports. But recently, the federal government has also been busy enacting laws and taking new regulatory actions aimed at the American operations of Chinese companies, including the telecom giant Huawei and some of China’s biggest state-owned phone service providers. U.S. authorities have also taken aim at CSubscribe or login to read the rest. Subscribers get full access to: Exclusive longform investigative journalism, Q&As, news and analysis, and data on Chinese business elites and corporations. We publish China scoops you won't find anywhere else. A weekly curated reading list on China from David Barboza, Pulitzer Prize-winning former Shanghai correspondent for The New York Times. A daily roundup of China finance, business and economics headlines. We offer discounts for groups, institutions and students. Go to our Subscriptions page for details.