Thanks for posting the distribution map of Lindera rubronervia. The distribution of many butterflies is limited by the host plant range, except for those species that are able to use several different host plants, so host plant distribution is important.
I assume that you must be Hu Shaoji's friend in Nanjing. It's good to be in direct contact with you. Did you go with him to Nankun Shan a couple of days ago? He was hoping to find eurous meridionalis there, but was worried about the weather.