Traveled Through Time to Be a Teacher for Wang Zanghai and Then Traveled to Jiumen

The protagonist Jun Ling found himself traveling back in time before the establishment of the Nine Gates. He used the system to control Jun Ling and made Jun Ling become Wang Zanghai's teacher and the leader of the Wang family. He played tricks on the Zhang family and secretly protected Zhang Qiling. He disappeared after giving the order to observe the Corpse Turtle Pill. Until one day, a train came to Changsha in the middle of the night. There was a person on the train who had lost his memory. There was a man beside him to protect her. Who could she be? Who is that man? Why would a man be by her side to protect her? Could she be Jun Ling? And who could be the man next to him? (The heroine's male identity is Jun Ling and her female identity is Jun Ling)