It should be Miletus chinensis assamensis.

There are only 3 species in your area.
The upperside have a narrow white band & the underside HW have a prominent series of dark postdiscal spots.
These match the dsf form male.
http://yutaka.it-n.jp/lyc2/80210010.html


The other two have wider UpF white bands.
http://yutaka.it-n.jp/lyc2/80270010.html
http://yutaka.it-n.jp/lyc2/80240010.html


TL Seow: Cheers.