About the genus Cordulegaster
Documents Initial message of V.Kalkman missing. The type locality, of course, is also a major port with deep historic ties to Europe, most famously with the German brewery that has been providing China’s most famous beer since 1903: Tsingtao! If the holotype is identical to one of the forms of boltonii, I’d say you can dispose of it! I’m okay with the other suggestions, although it’s always hard to find a place to park doubtful taxa like magnifica. If only…