Yun Jian was quite surprised as well, not expecting Inferno Ring to send a bigshot like Metal King Kong to save Hertz and his accomplices. After all, Job was pretty weak himself and the reason he could keep running Inferno Ring instead of being killed and replaced by members around him was due to Metal King Kong.
More crucially, Metal King Kong was someone from the mysterious person mentioned by Job. This made Yun Jian seethe, determined to kill Metal King Kong.
In spite of it, this could not happen now because Metal King Kong escaped. He would never return to Inferno Ring, too, after finding out that the organization was destroyed.
This meant that Job had died but Yun Jian did not avenge her past younger brother's death yet. Moreover, according to the dead Job, Yun Jian realized that the mysterious person and Metal King Kong could possibly come from Yulong Mainland. Like Lan Su, they could come from the stone cave in the catacomb.