The Daily Mail had good coverage of this story, but got the location very wrong. Look at the first map in the article:

https://www.dailymail.co.uk/sciencetech/article-9865429/Worl...

It's the place you get if you type 'Guanzhuang' into Google maps. The point they draw is not in Henan, even though the caption says Henan.

If you scroll down to the second map, it only shows historical context, not modern place names, but the marked location is correct: just west of Zhengzhou.