Return to Earth to be a God 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.nl fastest updating comic site. The Summary is

He had been missing for eight years. But no one thought that he had traveled to another world and cultivated for eight thousand years! After returning to the earth, he looked for his sister, but no one thought that he had overturned all the major forces on the earth at the same time while looking for his sister! He could make alchemy and fight, and if someone provoked him, he would be dead!