Mysterious Recovery: Class Never Ends

My name is Shen An, a native of the Republic of China and a teacher. My ability is a classroom. No matter what ghost is on the other side, as long as you enter my classroom, you must abide by my rules. If I say you stay in class, you will never get out of school. I survived the era of the Republic of China when the world was full of ghosts, and then made a decision that no one could understand - to sleep for a hundred years. It's not that I was afraid of death, it was that in that era there was no system or teammates, so one person couldn't survive alone. So I wait. When I woke up again, the world had changed. There is an organization called "Headquarters" that manages ghost controllers across the country, and there is a young man named Yang Jian who has evolved the ghost eyes to a level beyond my imagination. He is taking the path of evolution, and I am taking the path of rules - he is fire, and can burn everything clean; I am the ruler, and my energy can be burned wherever it needs to be. We don't need to be friends, but we all know: without a ruler, fire will get out of control, and without a ruler, fire will not burn cleanly. From the Republic of China to modern times, from the ancient town of Taiping to Dayuan City, from Zhang Youhong's gambling game to He Liansheng's entrustment - this is a story that spans a hundred years. About a classroom, a piece of chalk, and an agreement that has been waiting for more than 80 years.