There are many international intellectual property agreements which effectively make one country's copyright laws apply in another country. For example: https://en.wikipedia.org/wiki/TRIPS_Agreement
While I agree many copyright laws are broken in many ways, this sort of agreement is also what makes the GPL of source code copyright holders enforceable in other countries.
Chinese GPL violators were a big deal in 3D printing a few years ago, with many companies not releasing their 3D printer firmware source based off the Marlin GPL software.
It's been a while since I followed that but it's apparently got real legal precedent now, with a Chinese court fining a local GPL violator: https://segmentfault.com/a/1190000040661920/en
While I agree many copyright laws are broken in many ways, this sort of agreement is also what makes the GPL of source code copyright holders enforceable in other countries.
Chinese GPL violators were a big deal in 3D printing a few years ago, with many companies not releasing their 3D printer firmware source based off the Marlin GPL software.
It's been a while since I followed that but it's apparently got real legal precedent now, with a Chinese court fining a local GPL violator: https://segmentfault.com/a/1190000040661920/en