Your third line already indicates you know you are committing fraud.
*'(they work in highly corrupted country and skipping bank transfer will let them save a lot).'
Their business is legal from China's point of view as they pay for goods to Chinese company and then legally export it, then Chinese company pays necessary taxes and gets profit.
I actually don't know what happens in their central Asian country, but I guess, as in any third-world country, everything there is closely tied with corruption and racketeering.
I think it's is pointless to discuss "legality" in far-away countries with obscure laws unless it's hypocrisy.
There is a completely LEGAL way to avoid bank fees, and to save up to 15% on the cost of doing LEGAL business..
Ok, let's try LEGALLY avoiding any "fees", let's say, in Venezuela, Nigeria or Pakistan.
P.S There is not much down for any business man who takes his advice from someone who gets 'ideas' from forums…
At first, that is not my business and I'm not going to have any profit from it.
My interest there is only to show people the benefits of bitcoin and spread its adoption.
If you have better idea where I can find relevant information, I'll be grateful if you show me the way. Otherwise, your post can only be treated as trolling.