I Was Found Pretending To Be A Rookie In The Strange World?! is a Manga/Manhwa/Manhua in english language, Manhua series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Yu Lian, who is a first-class spirit master, decided to disguise himself as an ordinary rookie student to investigate an incident that happened more than ten years ago. The plan was supposed to go smoothly... So how did people find out that he was a bigshot?!