Spotted Lanternfly (Lycorma delicatula, 斑衣蜡蝉).
A planthopper with beautiful red, black and blue hind wings that are visible when they fly. This was the one of insects I most frequently observed in Huxingshan Yao Ethnic Township: one was among a circle of young boys, who were making it hop about as an impromptu game by slapping their hands on the ground nearby; eventually they sent it away unharmed. I imagine they are a bit of an agricultural pest too.