Can't the half-year training camp of Hefei Wendu Postgraduate Entrance Examination be refunded?

There should be an agreement before paying the money. Read it carefully. Generally, the agreement shall prevail. They should strongly advise you to do it in the last year. Specifically, you can look at the agreement signed at that time, and if there is a clause of no refund, you can refund the fee according to the agreement.