The Powerful Cultivator and It's System

Liu Gang was a 5-Star General that have no family or friends. After receiving a mission, he sleep but when he woke up, he was in a different body. With the help of the system, he recovered the memories of the owner of the body which was struck by a lightning and the owner have the same name as him. The world he was in was the world of cultivator! The owner of the body is weak and lazy. Thus, his cultivation process remain. He was the one and only son of Duke Liu Fu. Because he was weak, he was always bullied by his cousin, Liu Da. His mother died when he was young. His uncle and auntie did not believe that he will strong some day but his father believed him. Will Liu Gang be able to train the weak body and be strong???