The Clone of Long Chen had decided that he needed to stay distant from the family of Long Chen and not interact with them much if he didn't want to be found out. Even though he had the real one's memories, he knew that it wasn't going to be enough. If they talked too much with him, there was a good chance that they were going to find the truth.
That's why he had promised himself that he was going to keep his distance. He was going to make them believe he was real, but without getting close to them, so he wasn't caught.
Moreover, there was another element that influenced his decision. Now that he had the support of the Demon Princess, he didn't need the help of Long Chen's family to defeat him. He was sure the real one had no chance of survival, so he had already pushed the plan of the Immortal Queen of using his family aside.
