It should be Halpe wantona.

The HW does not have a central band.
The HW dark interneural spots form a series of pale spots on their outer margins. The lowest in space 1b is the largest.

Similar.

H. arcuata & veluvana both have FW spots 2 & 3 broadly overlapping.
http://yutaka.it-n.jp/hes/91350001.html
http://yutaka.it-n.jp/hes/91420010.html

H. handa is similar but FW is always without a cellspot & UnH have the veins in the pale ground area darken.
http://yutaka.it-n.jp/hes/91340001.html

H. wantona & pelethronix are very similar, but Yukata's image of H. pelethronix have the underside marks poorly contrasted.
http://yutaka.it-n.jp/hes/91400010.html

H. wantona.
http://yutaka.it-n.jp/hes/91410001.html
https://thaibutterflies.com/wp-conte...pe-wantona.jpg


TL Seow: Cheers.