The genus Potanthus forms a large family in Hesperiidae group and they have very similar pattern for each , so it is very difficult to identify each species. Besides, in south-east Asian territories there are many Telicota species which have also quite similar design of patterns as that of Potanthus group.
Frankly speaking, I don’t have confidence for identification of the inserted photo.If possible, please inform me the correct identification!
Anyway, this species was frequently observed in Hong Kong.

[Distribution]  throughout the south-east Asian region