Jeonji spent much of his youth in the Wa kingdom of Yamato Japan as hostage, going there in 397.
Upon his father's death, he returned home to find that his uncle Seollye had murdered Hunhae, Asin's other brother, and usurped the throne.
According to the Samguk sagi, in 406 Baekje sent a tribute mission to the Chinese court of Eastern Jin.
It would have been typical to send such an embassy to inform the Chinese court that a new king had taken power.
In 416 Jin sent envoys to grant the title "General Stabilizing the East" to Jeonji(Yeo Yeong).