Acer chingii, Hu. This rare Chinese maple may end up as a subspecies of Acer sinense, which has been raised in rank from A. campbellii subsp sinense by Flora of China. That source lists chingii as a species with reference to Murray who had it as a subspecies. After my short time of observing chingii it doesn't seem very much like sinense with the exception that it is 5-lobed; but I haven't seen flowers or fruit yet. Regardless it is a very attractive, architectural maple with interesting leaves with right-angled lobes. It seems an enthusiastic grower. Fall color is unknown.