Tian Yuanzhi and Jin Keji were both at the Earth Immortal realm.
Having cultivated the Taiyin Refining Technique since the Northern Wei era, they underwent three rounds of Taiyin Refining and eventually achieved the Earth Immortal status.
Upon learning Song Lin's identity, especially as a disciple of Master Zhengyang, the two displayed profound respect towards him.
"From now on, stay here and practice cultivation," Song Lin said.
"By the way, does your Taiyin Refining Technique now require an Inner Core?" Song Lin asked.
"Yes, while the ordinary Taiyin Refining Technique can bring forth rebirth, it still follows the Ghost Immortal path. However, Master Zhengyang proposed the dual cultivation of essence and vitality, wherein the physical body also undergoes cultivation, forming an Inner Core and achieving Three Flowers Gathering at the Top."
It was precisely for this reason that Zhengyang secured his place among the Immortals.