King Zhaoxiang of Qin
Because King Zhaoxiang had not yet legally come of age (traditionally at the age of 20), his mother, who was now known as Queen Dowager Xuan, became the regent. She was supported by her brothers, Wei Ran and Mi Rong (羋戎), as well as two other sons, Prince Yi (公子悝) and Prince Fu (公子巿), the four of them collectively known as the "Four Nobles" (四貴).
Zhao Bing
Zhao Bing was the seventh son of Zhao Qi (Emperor Duzong). His mother was Lady Yu (俞氏), a concubine of Emperor Duzong who held the rank of "xiurong" (修容). He was a younger half-brother of his predecessors, Zhao Xian (Emperor Gong) (r. 1275–1276) and Zhao Shi (Emperor Duanzong) (r. 1276–1278). He was enfeoffed as the "Prince of Xin" (信王) in 1274. His title was later changed to "Prince of Guang" (廣王).