First of all, I don't know what is the relationship between Changfeng and Hefei. If Changfeng is a prefecture-level city directly under the central government, then your provident fund in Hefei cannot be used in Changfeng. In other words, if you buy a house in Changfeng, you can't go through the provident fund formalities in Hefei.

If Changfeng is under the jurisdiction of Hefei, it can be used, because the provident fund is local in nature and has not been popularized nationwide.

But at present, it can be transferred to the provident fund. Different places have different rules. I suggest you consult your local provident fund center for details.