Question: What ethnic group constituting the majoirty of the population of China led the Northern Song Dynasty?

The Song dynasty (960–1279) was an imperial dynasty of China that succeeded the period referred to as Five Dynasties and Ten Kingdoms period (907–960) and preceded the Yuan dynasty (1271–1368), which conquered the Song dynasty in 1279.  The conventional division into the Northern Song dynasty (960–1127) and Southern Song dynasty (1127–1279) is created by the conquest of northern China by the Jin dynasty (1115–1234) in 1127 and the consequent shift of the capital from Bianjing (present-day Kaifeng) in the north to Lin'an (present-day Hangzhou) in the south. <SEP> Wuzhu (died 1148), also known by his sinicised name Wanyan Zongbi, or Jin Wuzhu, was a prince, military general and civil minister of the Jurchen-led Jin dynasty, which ruled northern China between the 12th and 13th centuries.  He was the fourth son of Aguda (Emperor Taizu), the founder and first emperor of the Jin dynasty.  Wuzhu started his career in the military in his youth, when he participated in the Jurchen rebellion led by his father against the Khitan-led Liao dynasty.  In 1137, in recognition of his contributions in battle, he was appointed as Right Vice-Marshal (右副元帥) and enfeoffed as the "Prince of Shen" (沈王).  In the final decade of his life, he was appointed to several high-ranking positions in the Jin imperial court, including Left Chancellor (左丞相), Palace Attendant (侍中), "Taibao" (太保), Marshal of the Capital (都元帥), "Taifu" (太傅), and "Taishi" (太師).  Between the late 1120s and 1130s, he fought for the Jin dynasty in a series of wars against the Han Chinese-led Northern Song dynasty and its successor state, the Southern Song dynasty.  He died of illness in 1148.  Throughout his life, he had served under three Jin emperors – Emperor Taizu (his father), Emperor Taizong (his uncle), and Emperor Xizong (his nephew). <SEP>  They constitute approximately 92% of the population of China, 95% of Taiwan (Han Taiwanese), 76% of Singapore, 23% of Malaysia and about 17% of the global population, making them the world's largest ethnic group with over 1.3 billion people. The Han Chinese, Han people or simply Han ( ; ] ; Han characters: 漢人 (Mandarin pinyin: "Hànrén"; literally "Han people") or 漢族 (pinyin: "Hànzú"; literally "Han ethnicity" or "Han ethnic group")) are an East Asian ethnic group. <SEP> The ruled area of the Northern Song extended to the southeastern coast.  Its Northern Border with the Liao state was the Hai River, Ba Zhou city, Hebei province, and Yanmen Pass, Shanxi (Jin) province, an essential pass of the Great wall.  Its reign reached northwest to the Hengshan Mountain in Shaanxi (Shan/Qin), the east of Gansu province, and the Huangshui River of Qinghai, all the way to the border with the state of Liao.  In the west, it shared the boundary line of Min Mountains and Dadu River (Sichuan) with Tibet and Dali Kingdom.  It was also adjacent with Vietnam across Guangxi province.  Still, the Northern Song Dynasty has been the smallest in terms of land area among all the united empires that established on the vast Central Plains.  As was recorded by "Taiping Huanyu Ji", the population of the Northern Song Dynasty exploded from 32,500,000 in 980 to 100,001,200 in 1110.