Logistics firms are scrambling to adjust to President Donald Trump’s new rules that threaten to upend their booming business delivering small parcels from Chinese sellers to American buyers.

Chinese retailers that sell on Shein and PDD Holdings Inc.’s Temu platform say they have been asked by logistics agents to ...

She’s been on the phone with importers from China this week to discuss shipments impacted by the new tariff, which went into effect Tuesday. “We’re working double, triple our time to try to do the ...