I'm from 1955

Before Einstein died, he clutched the manuscript of the unified field equations and his consciousness sank into darkness. When he opened his eyes again, the blackboard was filled with twisted trigonometric function symbols, and the sound of English lectures was humming. "Student Wu Stan, please solve this question." The teacher suddenly called on him. He stared at sin2θcos2θ=1 and blurted out: "This is much simpler than general relativity." As the whole class burst into laughter, he touched an unfamiliar smartphone in his school uniform pocket. When the teacher angrily scolded him for disrupting class, he whispered, "Sorry, I'm from 1955." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.