Fame and conviction for conspiracy against the emperor
In 1072, Li Chang, his maternal uncle, and Sun Jue his father-in-law had shown examples of Huang Tingjian's works to the famous poet and New Policy opponent Su Shi (Dongpo). In 1078, Huang presented Su with a letter and two elaborate gushi-style poems, to which Su returned with two poems of his own, matching Huang's rhyme-scheme. Huang's fame was secured when Su Shi (Dongpo) heaped his praises upon him, and the two became close friends for life.
So far, it seems that Huang had managed to avoid entanglement in politics, and in fact his early career as an imperial teaching official seems to have been in part secured by the favor of Wang Anshi, upon reading a poem of Huang's, hinting at retiring from the boredom which he was experiencing at that point of his career. At the time, there were two major parties, a "reform" party (also known as the New Policies Group), led by Wang Anshi and a "conservative" party, which included such prominent officials as Sima Guang, Ouyang Xiu, and Su Shi. Under the imperial system the winning side was chosen by the emperor (or the emperor's regent in the case of his minority). Imperial disfavor could range from death to a stalled career.
As Emperor Shenzong increasingly favored Wang Anshi's New Policies, as they were known, their opponents suffered politically: this included exile for Su Shi, beginning in 1080, to Hangzhou (which was the time period when Su adopted the nickname of Dongpo). As Su's conviction was for writing in a defamatory way about the emperor and his government, anyone who had circulated his writings without reporting them (as Shen Kuo did), was likely to be found guilty of conspiracy. Both Huang Tingjian and his Uncle Li were convicted as co-conspirators and accordingly given considerable fines (20 catties of copper). Huang was also exiled, first to Jizhou Subprefecture (now Jizhou District, Jiangxi), then to Depingzhen, in Shandong. Like, Su Shi, Huang Tingjian was known for good governance: light with taxes and empathetic with the common folk over whom they were placed in charge. Among other deeds, Huang Tingjian failed to enforce the New Policy of government monopoly of salt production.