Dao of the Bizarre Immortal is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Li Huowang, a high school student, possesses the ability to enter a bizarre world of cultivation with just a blink of an eye. In this strange realm, the person who calls him “Master” captures him, intending to use him as a human ingredient for pill refining. Meanwhile, in the real world, Li Huowang is a mentally unstable patient, residing in a psychiatric hospital, unable to continue his education. The doctors claim that the bizarre cultivation world is merely a hallucination. Now, trapped between truth and illusion, Li Huowang breaks down, crying out: “I really can’t tell what’s real!”