Neptis hylas (Linnaeus, 1758)
Common Sailer
July 7, 1999 - "Pic venu en volant" et temple de Lingyin - Hangzhou - Zhejiang - China © Frédéric Vivien
I believe impossible to guarantee any identification of this butterfly. This butterfly is very likely from the genus Neptis. Its design seems to correspond to that of Neptis hylas as presented in dabrera1985. Furthermore, this species is the "best known Neptis in the region".