You’ll probably be fine, but doing this type of thing may bar you from all sorts of jobs and govt programs you may not know about. Not saying this is reasonable but doing something as innocuous as this may even be against us law. As an example, I was seeking a business relocation
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21 year old's rarely negotiate $30 million/year purchasing agreements, especially with Iranian companies. You sound like you have a lot of experience for your age but...this is quite a lot to bite off. Yes, Chinese don't always pay.
I used to work at a trading company half a kilometer from North Korea...It's good to get burned a couple of times at your age :) Can't learn to dodge a punch until you get hit by a few. But yeah...I wouldn't be counting this chicken.