At first glance just from the underside alone this suggest Telicota bambusae.
The veins on the HW band appear vague or not dark-dusted. This feature is variable & difficult to judge in fieldshots.
The 2nd pic shows the base of space 2 is fully orange.
The species which have space 2 base with consistently with an orange patch are T. colon, besta & augias.
In the other species FW space 2 base is black.
However some examples may have traces of orange especially in T. bambusae.