The rapid-fire shots of tariffs and import curbs hearken back to Trump’s first term in office, when the U.S. and China engaged in a trade war that spanned most of Trump’s first four years in office and was continued to a certain extent under his successor, Joe Biden.

In the two days since President Trump enacted new tariffs on goods from China, none of the major US shipping companies and couriers have yet announced detailed policies on new fees, though some have warned of possible delays and disruption.