The world's largest city in 4300 years ago陕西神木石峁遗址

Shimao ancient city is the largest city in the world between 2300bc-1800bc, 4.25 square kilometre with more than 10km stone wall,it is much larger than Mohenjo-daro or Memphis, Egypt：
https://en.wikipedia.org/wiki/Shimao
located in Shenmu county,Sha'anxi province:
N38.562628 E110.305285
found in 2012.