Han Sen was still unsure whether or not his Jadeskin had issues. Regardless, he decided not to continue practicing it and put it aside. Instead, he moved his focus on to training with the Dongxuan Sutra.
Han Sen wanted to learn the first tier of the Dongxuan Sutra sooner now, so he could unlock his first gene lock.
He saw the strength that Xue Yikuang had possessed through the unlocking of his own first gene lock. Han Sen was beginning to realize that acquiring such power would be imperative for the future, particularly with his desire to do battle with super creatures. He had witnessed first-hand the strength possessed by super creatures, like what the silver fox and the blue seahorse had shown, and he knew he would have to improve a great deal before he could be a match for them.