They're not quite Neanderthals and not quite modern humans. They're something else, but no one is sure what.

Newly-examined fossils suggest that an unknown species of human was roaming parts of northern China between 60,000 and 120,000 years ago. Alternatively, the fossils could be the result of interbreeding between two of the known species.

http://www.bbc.com/earth/story/20150122-is-this-a-new-species-of-human