Unable to withdraw
It led you to deposit thousands of yuan to help you win. So you would deposit more. Then it blocked your account by default and asked for fees and taxes for unlocking. It caused more deposit.
Scam
The following is the original recommendation
不出金
最开始会让你充几千块钱让你挣钱,接着会让你充大量资金进去,然后以违约而冻结账户,然后让你交相同账户金额解冻,然后再让你交税,一步一步让你充钱