25 yuan. Yunfu Huimin Insurance can report 2,5 yuan for hospitalization at its own expense of 5, yuan. Provisions on reimbursement of Yunfu Huimin Insurance:

1. The part above 5, yuan (including 5, yuan) in 3 yuan will be compensated by the medical insurance fund by 5%, so Yunfu Huimin Insurance can report 2,5 yuan for hospitalization at its own expense of 5, yuan.

2, 5 yuan more than 1 yuan (including 1 yuan) the following part, 6% compensation by the medical insurance fund.

3. The part between 1, yuan and 3, yuan (including 3, yuan) will be compensated by the medical insurance fund by 8%.

4. The medical insurance fund will compensate 9% for the part above 3, yuan.