[Why] After Huang Chao's uprising was put down, the Li-Tang court's prestige had collapsed, and Central Plains power fell into the hands of the surrendered general Zhu Wen and other military governors. Frontier governors had entirely kidnapped the center, and enthronement-and-deposition power-seizure was a settled fact. [What] Zhu Wen used military strength to control Guanzhong, forcibly deposed and killed Emperor Ai of Tang to set himself up as emperor, founding the Later Liang. He even threw the bodies of more than thirty steel-backboned ministers of the court into the Yellow River, an episode known as the White Horse Stage Disaster. [Who] Zhu Wen was a cruel and cold-blooded, cunning frontier-governor usurping hero who personally ended the glorious Li-Tang dynasty. Emperor Ai of Tang was the innocent victim and puppet last sovereign. [How] Zhu Wen's usurpation of Tang formally ended nearly three centuries of Tang rule and opened the tragic grand curtain of the half-century Five Dynasties Ten Kingdoms fragmentation. It marked medieval prosperity civilization's definitive slide into ruined tide.
Why
The historic event of Founding of Later Liang represents a key developmental peak of the Huaxia dynastic system. The chaotic transition between high Tang and Song civilizations. By establishing this moral or administrative benchmark, it continues to shape the structural and philosophical fabric of ancient Chinese statecraft.