[Why] The structural illness of Northern Song's accumulated weakness deepened, and the Liao and Western Xia in the north repeatedly produced military pressure. On ascension Emperor Shenzong resolved to reform outside the norm, to enrich the country and strengthen the military, and save society from crisis. [What] Wang Anshi, with Shenzong's full support, implemented a series of state-intervention economic measures including the Green Sprouts Law, the Service Exemption Law, and the Market Exchange Law. He sought through state intervention in commerce to curb the powerful and expand the treasury's revenue. [Who] Wang Anshi was a great reform-pioneer of supreme tenacity, holding that weather changes are not enough to fear and ancestors' law is not enough to follow. Emperor Shenzong was the political backer Bo Le emperor; Sima Guang was the leader of the conservative camp. [How] The reforms greatly increased the Northern Song court's fiscal and military reserves but also for poor execution sparked fierce factional split that severely shook social foundation. It is humanity's earliest exploration of financial intervention.
Why
The historic event of Wang Anshi's Reforms represents a key developmental peak of the Huaxia dynastic system. The earliest comprehensive state-directed economic modernization drive. By establishing this moral or administrative benchmark, it continues to shape the structural and philosophical fabric of ancient Chinese statecraft.