If the title wasn't obvious enough the deposit 20k to withdraw is a dead giveaway. There should be no lockup on your account no matter how much money you make. The flunctuation part is complete bs.
who is the friend that led you to the pitfall? Do not deposit any more cents. They try to juice last cent out of you. do not worry they will sue you, because if they do, they will go to jail. It is nothing to do with Chinese bank system, since crypto is illegal in China. you said you are a software engineer, how old are you? when the first red flag flashed, you deposited more which is quite naive. you could report to police, but it is useless, since they are not in us, and you do not know who and where they are. You sent them crypto, so even bank can not trace them. The only clue is website, try to find who is the website owner, and where he is. Possibly that doesn’t help you either since the domain name rented anonymously. I feel for and sympathize with you. But no one can help you. It is just some money, you can live without it. you still have job and you sound young.
"Hello I have problem with my withdrawal from a chineese trading platform (https://wap.ghcap.vip/)" Did the appearance of the website not give you pause? That's about as scammy as one could get. China got your money and you ain't getting it back. You learned your lesson. Move on. Says you are in Bulgaria? They are in the EU I believe? Sheesh, when in Europe, deal with Europe brokers.
You've been scammed and there's nothing you will be able to do about it. My advice is to swallow your pride, exercise your anger out, cry if that helps make you feel better and meditate to release the last remnants of negative energy. You should come out of this a wiser man. Oh, and you should choose better friends.
As if you and your ilk are anything but strange. You do not know normal. Ok, k, that's New Zealand, but close enough to you guys there!