Appeal. The most direct way. However, there are two data you should know. When the debt voucher is complete, the success rate of the case is over 90%, but the recovery rate of execution is less than 8%. This is the current situation in China.
Third, ask a third party to collect it. These third parties are formal enterprise credit management companies. They have to pay a certain percentage of commission, but they don't have to pay in advance. They will give you a commission when they receive the money, but they may help you get it back. (That's what I do)