Song Yang's Ancient Teaching Journey

After Song Yang traveled through time, in order to complete the mission and benefit the Northern Kingdom, he worked hard to train four young pillars. He was about to succeed and retire, but in the end one of them killed her; one became a real white-haired ghost to save her; one went to the Southern Kingdom; one wanted money but not the country, and the mission failed. I met these four enemies again at my last chance. It's so difficult to have so many friends all over the world! They blocked Song Yang's dream of becoming a teacher everywhere, and they all wanted to "support" the former teacher. Can Song Yang return to modern times...