This looks like Jamides celeno or more commonly a common cerulean butterfly, but it can't be. Common ceruleans should be only in Taiwan. But still, this butterfly really resembles the common cerulean...
When I first saw this, I thought it was a piece of paper on a twig, but when approaching it, I started to think it might be a butterfly but was not sure because it has a pair of small black spots on the underside of the hindwings beside each hindwing tail and these black spots (which look like eyes) and the hindwing tails (which look like antennae) made the end of the hindwings look like the head, making me wonder if the butterfly had two heads???