Introduction to Fenglingdu: Fenglingdu has been the chokepoint between Hedong, Henan and Guanzhong since ancient times, and has always been a battleground for military strategists. The ancient battlefield between Wei and Qin was here. Famous battles such as Cao Cao's crusade against Han Sui and Ma Chao in the Eastern Han Dynasty, and Yuwen Tai's defeat of Gao Huan in the Western Wei Dynasty all took place at Fenglingdu.