beta
think it is Korean also has anime but it starts with guy's parents leaving him under there burning house saving his sister and they ran away think it was from earthquake (it is set in modern day) a immortal master saved him and taught cultivation to him his master wanted to have him give letter to his friend so he returned to the modern world he helps the masters friend and is mega OP he thinks he is low level due to his master down grading his level he eventually meets up with his sister and parents