US Postal Service has stopped receiving parcels from China and Hong Kong while it rejigs operations after President Trump closed the de minimis loophole

The lifting of the de minimis loophole will hurt the Chinese and US e-commerce firms but won't kill them, an analyst said

"These moves are warnings that China intends to harm US interests if need be, but still give China the option to back down," one analyst said

Social media accounts run by Chinese state media, plus embassies highlighted DeepSeek's 'breakthrough' prior to the stock crash on Monday and push Beijing's narrative on surpassing the US in critical areas of competition, report says

US executives say limiting the 'distillation' process from open-source models, in which one AI system learns from another, may be difficult to stop

Microsoft's security researchers observed that "individuals they believed to be connected to DeepSeek" were involved in an unauthorized data transfer several months ago

Meta has reportedly established four "war rooms" with engineers to assess the AI model developed by Chinese startup DeepSeek, insiders have alleged

Satellite photos show China appears to be building a large laser-ignited fusion research centre in a southwestern city

American billionaires and tech giants are falling over each other to get their bids in for TikTok

Little-known China startup allegedly spent $5.5 million, and used sub-optimal Nvidia chips, on an AI model that rates with the best created by US tech giants; this caused Nvidia and other tech shares to sink

WTO director-general Ngozi Okonjo-Iweala warned that tariffs of 25% or 60% could trigger tit-for-tat reprisals that return the world to the economic crisis of the 1930s

Tech giant, which owns TikTok, but may soon be permitted its sell its US arm, will spend half of that amount abroad on AI-related infrastructure, such as data centres and networking equipment, sources say