40 yuan. According to the information on the Kuxiu official website, 100 crystal coins in the Kuxiu APP are equal to 1 yuan, and 4000 divided by 100 equals 40, so 4000 Kuxiu crystals can be withdrawn for 40 yuan. Kuxiu is an interactive live broadcast app like a reality show. It is a dating community for online video chat with real anchors. Users can interact with their favorite anchors through text and live chat.