Final answer:
The Hexian remains are believed to be older than the Zhoukoudian site by several hundred thousand years based on archaeological studies placing them further back in the timeline of human evolution in China.
Step-by-step explanation:
The dating of the Hexian remains is a subject of paleoanthropological study and is concerned with human prehistory, a topic typically covered in history or anthropology courses. The Hexian remains in question are older than those found at Zhoukoudian, a significant site for studying the early humans in China dating back to the Paleolithic period.
It is identified that based upon archaeological evidence and radiometric dating methods, the Hexian remains appear to be older than those found at the Zhoukoudian site by potentially several hundred thousand years which places them further back in the history of human evolution in this region of the world.