If you buy things from a country you have to obey the law on where those things you bought can be sold. It would be no different if they sold US made components for telecommunications to North Korea. It's npt overreach really. The extradition part has been normal for decades.I'm still surprised that the US is allowed to arrest a Chinese citizen for breaking US sanctions. I understand the concept of holding an American company and the American subsidiary to laws, but o.o.
If a US citizen was in Japan, and was arrested by the Japanese government for extradition to China because China had a sanction against Vietnam and the US citizen lied to China to do business with Vietnam... I'd consider that overreach by China.
If she tries to escape to China, I wonder what will happen.
If she escapes to China it would mean huge economic fallout and damage to China if they didn't send her back. China would rather have the USA drop charged then have her escape illegally