Eternal Ghost Demon Emperor

The story follows the male protagonist, Ye Feng, who is ambushed and cast down from the divine realm into the mortal world, where he inhabits the body of an ordinary cultivator also named Ye Feng. This Ye Feng possesses the ancient divine ghost physique, but due to a childhood injury to his Tanzhong acupoint, his meridians are damaged, rendering him unable to cultivate. He is later saved by Yu Xianlin, the sect master of Yulin Sect, and becomes a menial worker in the sect's chores department, where he is repeatedly bullied. After a fortuitous encounter, he obtains the Divine Emperor Pearl from the divine realm, which quickly unblocks all his meridians. He then cultivates divine arts, uncovers the truth behind his parents' murder, avenges them, and eventually ascends to become the Eternal Ghost Demon Emperor. — Description from novelcodex.org