As others have rightly said. I am pretty sure that a lawyer will only add to your loss.
Ask yourself why a Romanian who lives in London would operate out of a Hong Kong company, and then ask yourself what the chances are that your money will be sitting in his Hong Kong bank account long enough for you to get a Court Judgment against that Hong Kong Company and a Garnishee Order placed on the bank to get it ring fenced for you.
I don't know the sums involved but unless it is big and the company that owes you have any kind of reputation that they would want to preserve, your chances are slim I am afraid.
That doesn't mean I would let it go of course but a good lawyer is not likely to offer no success no fee on international debt collection. In fact they could get in trouble for doing so.
http://www.scmp.com/news/hong-kong/a...g-kong-lawyers
Why not have a chat with a local "debt collection agency" before a lawyer? Many do operate on a no success no fee basis. I just did a quick search for you and looked at a couple of sites and this one looks ok on the face of it. Not recommending them and have no knowledge of them but I am familiar with the international debt collection process and having a local presence and having somebody prepared to turn up at their (probably accountant or lawyer's) office is a very important factor in being taken seriously.
This page explains quite clearly the steps they would take.
http://www.mncgc.com/standard-operat...ures/?lang=en/
but I would recommend you do a little due diligence on anybody before instructing them to collect money on your behalf as you do want to end up with collected funds being paid to you.
Hope this helps in some way. Good luck