This just PRC applying their version of US export controls. PRC gets to control PRC originated algos, i.e. same as TikTok. They haven't gone the step up to ban PRC strategic talent from working in US. The founders aren't held "hostage", they're under investigation for violating export control and national security laws. PRC hinted signalled pretty clearly they would use art12 (catch all clause) of export control laws and offshore affiliate rules (to address Singapore loophole) before Manus deal closed, Manus ignored loud hints. The difference is PRC wasn't super judicious in enforcing AI related export controls (especially since agent development new hence art12), US would have ensured this control list tech wouldn't leave US territory via foreign product rule / CFIUS / BIS. PRC gave pretty clear signals to Manus what was going to happen hoping they'd unwind on their own, but they didn't so now they're going to eat shit.