About the issue of passport detention, urgent, urgent!

Public security agencies, embassies and consulates can basically not get it back due to many reasons. A few may send it to the original issuing authority.

Other departments cannot detain, but many units will manage it on their behalf, such as Sinopec, China National Petroleum Corporation, etc., which will keep the passports of migrant workers abroad

Please contact the embassy. I don’t know if they are being detained. The reason is hard to answer