Why would China care about that? US sanctions only apply to the US. Are you saying China needs American permission to have ties with other countries?
You haven't studied the matter. There are secondary sanctions in place. Unless there is something really important (like oil), China isn't willing to breach these sanctions
If anything, a nuclear Iran is in China's interests.
No.
A deal need to made for serious Chinese investment to happen in Iran
US must drop all sanctions unconditionally. They violated the JCPOA. Iran has done nothing wrong.
I agree, but in geopolitics there is no fair or unfair. It all depends on who is more powerful and who has more interests in a deal happening. Complex matters
Just to make it clear, China even followed a lot of the 2014 sanctions imposed on Russia. Does anyone here really thinks that current Iran is more important to China than Russia?
IMO the only way I see China breaching such sanctions is if they to fully sanction Russia in a potential Ukraine invasion scenario. And even there, I think that China would only selectively break the sanctions