In 87 BC, Emperor Wu was seriously ill, and he created his youngest son Liu Fuling crown prince. He summoned his close associates to his bedchambers to designate one of them, Huo Qubing's younger brother Huo Guang, as regent. Huo initially declined, arguing that Jin was more capable, but Jin pointed out that he was ethnically Xiongnu and that the other officials and the Xiongnu might think of him lightly. Emperor Wu thus designated Huo as the primary regent, but also designated Jin and Shangguan Jie (上官桀) secondary regents. He soon died, and Liu Fuling took the throne as Emperor Zhao. (In his will, Emperor Wu, citing the suppression of Ma's plot, created Jin, as well as Huo and Shangguan, marquesses, but Jin, citing Emperor Zhao's young age, declined.)