[Objectives] Dopasia hainanensis Yang, 1983 was first described based on one specimen from Mt. Diaoluo, Hainan, China by YANG Rong-Sheng. D. hainanensis is the least studied species in the Asiatic genus in China. The relationship between morphology and molecular phylogeny is still largely unknown. [Methods] Between 2018 and 2019, two Dopasia specimens were presented from the type locality of D. hainanensis and one Dopasia samplefrom the type locality of D. harti. After the comparison of the preliminary morphological characteristics, it was found that the two Dopasia specimens from Mt. Diaoluo may be the D hainanensis and the D. harti respectively. In this paper, by adding morphological data of other specimens from Mt. Diaoluo and Mt. Wuyi, combined with mitochondrial cytochrome b (Cyt b) DNA sequence analysis, we further verified the taxonomic status of the D. hainanensis. [Results] Based on comparison of morphological characteristics (Appendix 2) and mitochondrial cytochrome b (Cyt b) DNA sequence (Appendix 1), the two Dopasia specimens from Mt. Diaoluo are the same species. The phylogenetic positions of these specimens (p-distance ≥ 4.96%) from the two places are very close (Fig. 2), and the morphological differences are not obvious, which indicating the difficulty to find the typical distinguishing characteristics. [Conclusion] Therefore, it is supported that D. hainanensis is a synonym of D. harti, and D. formosensis is a synonym of D. harti, and D. cf. hainanensis in Vietnam may be a new species or subspecies that has not been described. In view of the complex intraspecific phylogeny under D. harti, more detailed samples and markers are needed.