Henan, Shaanxi, Shanxi and Shandong, which province has the strongest historical background?

Shanxi, of course. China culture in 5000 years: Shanxi, Yao Shunyu and other cultures all came from Shanxi. Zhongtiaoshan area in Yuncheng, south Shanxi Province, formerly known as China. Shanxi's later development is slightly worse than other regions, but it is thicker than history. Everyone thought it could be thicker than the history of Shanxi.