But, brother, I sympathize with you, but the law in China only tells stories. However, I personally think that civil incidental criminal is unreasonable and should be criminal incidental civil. So, as the upstairs said, you should file a criminal incidental civil action. So you can hear it.
China is a second-instance system for life. If not, you'd better appeal at the same level court. Of course, you only appealed to the civil part, because the criminal part can only appeal to the procuratorate, and they decided to appeal. But you don't need a procuratorate, which will be very troublesome, because you only need to appeal the civil part to the higher court, and they will retrial the civil part and the criminal part according to the procedure. In other words, if you appeal to civil affairs, it is equivalent to appealing to both civil and criminal cases!
Alas, China is like this, and that's all I can say.