Urban Reincarnation

Chen Tian looked at the surrounding environment and the spacious room. Directly ahead, on the wall, is a blackboard. There is a banner above the blackboard, and the slogan gives people a sense of urgency and oppression. [There are still 15 days until the college entrance examination! It was obvious that this was a classroom, surrounded by students. He was also wearing a school uniform. I obviously graduated from university and started to work in scientific research, so why am I back on the eve of the college entrance examination? "Time traveled?" Chen Tian murmured to himself.