I have a winning verdict. Does Zhumadian charge a lawyer's fee after executing the payment?

No charge. According to the Measures for the Administration of Lawyers' Fees, in Article 9, the fees for lawyers' services with market-adjusted prices shall be determined by the law firm through consultation with the clients. The main factors that a law firm and a client should consider when negotiating the fees for lawyer services are: the working time spent, the difficulty of legal affairs, the client's tolerance, the risks and responsibilities that lawyers may bear, the lawyer's social reputation and work level, etc.