Butterfly

I got it, creek. Thank you.

DanielePralong, Thank you for your detailed explanation.

Vincent, the species you are suggesting here in Taiwan has same genus but different species. It is Argyreus hyperbius (Linnaeus, 1763).
http://www.creek.idv.tw/940_07.htm

OK. Thank you, DanielePralong

Vincent, the species you are suggesting has a very different wing shape, and different black markings. The butterfly here has angular notches on the outer edges of its wings. That's why butterflies in the genus Polygonia are known as anglewing butterflies.

Argynnis castetsi Oberthür, 1891 . The name I have suggested is of the identical subspecies in south India (Western Ghats)