Traveling Through the Xuanjian Immortal Clan with the Instruction Manual

No one helps me to reach the top of the mountain by walking on the snow! Zhuang Yun, a college student, was unintentionally involved in a battle between great avenues, where immortals were surrounded, demon cultivators abounded, and dragons were rampant. The protagonist started practicing as a mortal. With the memory of his previous life and a dumb book, and through a little bit of planning, he finally gained a place in the world of immortal cultivation. He finally achieved the right result and was ranked in the immortal class, but found... Narrative flow + decisive killing + no harem