Emperor Taizu of Song (21 March 927 – 14 November 976), personal name Zhao Kuangyin, courtesy name Yuanlang, was the founding emperor of the Song dynasty of China. He reigned from 960 until his death in 976. Formerly a distinguished military general of the Later Zhou dynasty, Emperor Taizu came to power after staging a coup d'état and forcing Emperor Gong, the last Later Zhou ruler, to abdicate the throne in his favor.

During his reign, Emperor Taizu conquered the states of Southern Tang, Later Shu, Southern Han, and Jingnan, thus reunifying most of China proper. To strengthen his control, he lessened the power of military generals and relied on civilian officials in administration. He was succeeded by his younger brother, Zhao Kuangyi (Emperor Taizong).

Born in Luoyang to military commander Zhao Hongyin, Zhao Kuangyin grew up excelling in mounted archery. Once, riding an untamed horse without a bridle, he knocked his forehead on the wall above the city gate and fell off, but got right back up and chased the horse, eventually subduing it while going unharmed. In the mid-940s, he married Lady He on his father's arrangement. After wandering around for a few years, in 949 he joined the army of Guo Wei, a jiedushi (military governor) of the Later Han dynasty, and helped Guo quell Li Shouzhen's rebellion.

In 951, Guo Wei rebelled and created the Later Zhou dynasty. Because of his brilliant combat skills, Zhao Kuangyin was promoted to a palace guard commander. Chai Rong (Emperor Shizong of Later Zhou) frequently met Guo Wei and noticed Zhao Kuangyin's potential. Under his command, Zhao Kuangyin was made into a commander of the cavalry units. Under Chai Rong, Zhao Kuangyin's rise to power had begun.

Zhao Kuangyin's career started at the Battle of Gaoping, against the alliance of the Northern Han and Liao dynasties.

This rivalry started when Chai Rong ascended the throne and Liu Chong decided to work with the Liao dynasty. In the initial confrontation, the army's right flank, led by Fan Aineng (樊愛能) and He Hui (何徽), was defeated. Looking at the situation, Zhao Kuangyin and Zhang Yongde (張永德) led 4000 elite Palace troops to counter the Liao army. Zhao Kuangyin's exhortation for the loyalty to the emperor quickly strengthened morale. The small force held off the larger Liao army until reinforcements arrived. In the end, the successful counter repelled the Northern Han back to Taiyuan.

The victory raised Zhao Kuangyin up to the post of the grand commander of the palace guards, as well as reorganising and training them. More importantly, he developed the relations with other generals and officials related to the Chief of Palace, including Shi Shouxin, Wang Shenqi (王審琦), Yang Guangyi (楊光義), Wang Zhengzhong (王政忠), Liu Qingyi (劉慶義), Liu Shouzhong (劉守忠), Liu Yanrang (劉延讓), Mi Xin (米信), Tian Chongjin (田重進), Pan Mei, his brother Zhao Kuangyi, Shen Yilun (沈義倫), Lu Xuqing, Zhao Pu (趙普), Chu Zhaofu (楚昭輔). Within a few years, Zhao Kuangyin completely controlled the palace guards and even developed a set of officials under him with the people mentioned above.

Soon, he was promoted to a jiedushi (military governor), controlling most of the military power under Chai Rong. Nevertheless, he still had two rivals – Zhang Yongde (Guo Wei's son-in-law) and Li Chongjin (Guo Wei's nephew). In 959, after a trap^{[clarification needed]} set by Zhao Kuangyin, Zhang Yongde was demoted. After the death of Chai Rong, the Later Zhou throne was left to his seven-year-old son Guo Zongxun, and the second rival, Li Chongjin, soon found himself lacking the political backing. As a result, Zhao Kuangyin was able to use his influence to transfer Li Chongjin to Yang Prefecture as a jiedushi.