I believe this is an Vanessa Atalanta on the Paper Mulberry tree. It has the marking of "89" on it's right hindwing, as mentioned in the Wikipedia description. When I saw it it reminded me of a Painted Lady, although I knew the markings didn't match.
The Red Admiral is a well-known colourful butterfly, found in temperate Europe, Asia and North America. The Red Admiral has a 45–50 mm wing span. The species is resident only in warmer areas, but migrates north in spring, and sometimes again in autumn.