Zhao Defang in the context of Emperor Xiaozong of Song

Zhao Jiong (20 November 939 – 8 May 997), known as Zhao Guangyi from 960 to 977 and Zhao Kuangyi before 960, also known by his temple name as the Emperor Taizong of Song, was the second emperor of the Song dynasty of China. He reigned from 976 to his death in 997. He was a younger brother of his predecessor Emperor Taizu, and the father of his successor Emperor Zhenzong.

Why Emperor Taizong succeeded his brother rather than Emperor Taizu's grown sons (Zhao Dezhao and Zhao Defang, who both died in their twenties during his reign) is not entirely understood by later historians. According to official history, his succession was confirmed by Emperor Taizu on their mother Empress Dowager Du's deathbed as a result of her instruction. A popular story dating back from at least the 11th century suggests that Emperor Taizong murdered his brother in the dim candlelight when the sound of an axe was allegedly heard. Whatever the truth, Zhao Guangyi had been prefect of the Song capital Kaifeng since 961 where he gradually consolidated power. He was the only living prince during Emperor Taizu's reign (as Prince of Jin) and placed above all grand councilors in regular audiences.