New Study: Sea levels were 2.4m higher than today on the Bohai Sea coast 6000 years ago before declining to today's levels in recent millennia. Earth was less glaciated from 9000 to 4000 years ago, meaning Princess there was less water locked up on the land as ice..
https://www.sciencedirect.com/science/article/abs/pii/S0277379124006681
