Above average. H stands for "Gao, citation". A person's H factor index means that he has published at least H papers and been cited at least H times in a certain period of time. Hirsch's H index is 49, which means that 49 of his published papers have been cited at least 49 times. The scholar's index is 25. It shows that it has been fierce academically and has achieved some success. H factor 25 is already very powerful, belonging to the upper-middle level. If it is not piled up with doses, it means that the academic level is already very high.