Li Zicheng, the leader of the peasant uprising in the late Ming Dynasty, was able to lay a solid foundation in Beijing in March 1944, forcing Emperor Chongzhen of the late Ming Dynasty to hang himself and overthrow Daming Mountain. Song Xiance, the chief strategist, has made great efforts, and as the name implies. Song Xiance, also known as Song Kangnian, was nicknamed Song Shorty or Song Haier because of his short stature.

Niu Jinxing introduced Song Xiance's participation in 1642 Li Zicheng peasant uprising. Song Xiance is a scholar. He studies very hard. He is proficient in Taoism, astronomy, geography and divination. He lives as a fortune teller and travels around the world, making him feel at home everywhere. Song Xiance's erudition impressed Li Zicheng, who once lived by herding sheep in the northwest. Li Zicheng spoke highly of him and often asked him for advice and worshipped him as a strategist.

Song Xiance often exhorted Li Zicheng to establish peasant regime quickly in the name of ghosts and gods. The Ming Dynasty was corrupt and its demise was just around the corner. Only by establishing political power can we unite people's hearts. Song Xiance also put forward the slogan of "eighteen sons are the main artifacts" to incite the masses and strengthen the peasant rebels. Song Xiance also demonstrated his outstanding military talents. At the gate of Nanyang, he commanded the peasant uprising army to take a roundabout strategy, which brought down the Ming army, besieged the city and pulled out the village, and made great achievements. In January, the seventeenth year of Chongzhen, Li Zicheng farmers broke through Xi 'an and established Dashun regime. Song Xiance also actively made suggestions for consolidating the political power, formulated the legal system, rewarded officials and strictly rewarded and punished them, and was named the founding great strategist by Li Zicheng.

After Li Zicheng's team entered Beijing, it quickly degenerated, and people headed by Niu Jinxing, the founding prime minister, began to indulge in pleasure. Song Xiance clearly saw this, and several times advised Li Zicheng to have serious military discipline, but it was useless. Song Xiance came up with the idea of giving up Li Zicheng's support for Yan Li, a fellow counselor, but Yan Li was quickly killed by Niu Jinxing's slander, and he had to flee with Li Zicheng's troops. Song Xiance's whereabouts are unknown during the flight. However, according to an article by Tan Qian, a historian of the Ming Dynasty, Song Xiance was captured by the Qing army. However, the Qing army attached great importance to Song Xiance's fortune-telling and divination ability. After sparing his life, Song suggested returning to his old job and began to travel around the world.