The US Postal Service has halted parcel shipments from mainland China and Hong Kong, though letters remain unaffected.
This follows new rules closing a tax loophole that allowed small packages worth $800 or less to enter the US without fees, a move part of President Trump’s broader trade policy.
The loophole, exploited by Chinese e-commerce giants like Shein and Temu, has faced growing scrutiny.
The so-called de minimis tax loophole has faced increased scrutiny in recent years as Chinese e-commerce giants like Shein and Temu have used it to reach millions of US customers.
Changes to the tax exemption under President Joe Biden were already in progress before Trump took office.
But in his trade announcement at the weekend, Trump extended tariffs to all China goods being imported into the US, including fashion items and toys.
In retaliation, China will impose tariffs on US imports starting February 10, with coal and LNG facing a 15% levy, and other goods like crude oil and machinery facing 10%.
