Overnight spot by BY3AKL1X

Last night I was spotted by a station who identified as BY3AKL1X, coming from grid OM89ua, which is on the coast of mainland China, near Tianjin.

http://qth.map.googlepages.com/?qth=OM89ua&t=n&from=

I'm not sure what to make out of the callsign though (although I admit to not knowing much about Chinese callsigns). Is this a U.S. call (KL1X?) operating in China?