Retro Trailer: Spiritual Kung Fu (1978) by Lo Wei

Yi Lang is a martial arts student at a Shaolin Temple, whose shenanigans and laziness, however, have made his teachers consider him as something between a joker and a nuisance. One night, during which he was supposed to stand guard, an anonymous masked thief manages to steal a book from the library which teaches a forbidden, lethal kung fu technique, which eventually ends up in the hands of Lu Qing, who proceeds on besting a series of kung fu masters. Yi Lang and the rest of the monks who were supposed to guard the book are punished, but news about Lu Qing eventually reaches the temple, as it falls to the fighters of the monastery to put an end to his non-stop path. A bit later, Yi Lang volunteers to guard a supposedly haunted part of the library, but during the night, he discovers that the rumors are true. Five red-haired ghosts appear, who are actually masters of a lost style known as Five Style Fists. The young man eventually becomes their apprentice, and his abilities soon become so significant that he manages to pass a series of tests against the teachers of the monastery, and be promoted to the man who will fight Lu Qinq. A murder inside the premises of the monastery, of the leader of the Wu-Tang Clan, however, indicates that something more is amiss.