Whilst taking photos of the Clidemia, I also spotted this tiny Pale Grass Blue (scientific name: Zizeeria maha serica) perched on a leaf. Its host plant is the Oxalis corniculata, according to Kew's Butterfly Circle. This Oxalis resembles the O. stricta I posted earlier although I am not sure if I was correct in the identification. A link on this Oxalis is shown below for reference: