
There is no previous owner of the body. Li Zhu's soul is reincarnated/reborn as baby Ye Li. But since Li Zhu is a deity his spiritual power is too strong for his physical body so Ye Li's teacher sealed some part of his soul/memory. The seal made him become souless/emotionless.
Li Zhu/Ye Li is suppossed to gradually awaken his sealed soul as he cultivate and strengthen his physical body. At the beginning of this story, Ye Li is already live for hundreds years and actually he start to show emotions little by little, an indication that his body is strong enough for his soul and he will fully awaken soon.
ik that they are parts of the same soul but something just doesn't fit right. ofc it's just my opinion.so don't start anything in the replies, u can hv ur own opinions and i can hv mine