Deuterium Lamp: Stagnation Boundary

Sun Tao, a young nuclear power technician, lives his life down to the minute: alarm clock at half past six, eight minutes of commuting, and forty minutes of reading on the subway. He was used to folding up his emotions and stuffing them into a certain corner - unexpectedly, he woke up and found himself a little boy in the 1970s and 1980s, trapped within an invisible wall. Time froze inside the wall, but the world outside the wall remained as usual. The grandparents were unaware of the day-to-day cycle, and Sun Tao's knowledge of nuclear power in his previous life became the only key. This is not an unexpected time travel, but a metaphor about "trapment". He used the formulas of deuterium and tritium to measure the stagnant space and time, and used his persistence in truth to knock on the boundaries of the wall. When the glimmer of fusion finally penetrated the barrier, he took the old man's hand and walked towards the future that had not yet been illuminated. "Someone has to think about these things. Not everyone has to go to a tokamak and turn screws to care about the future of human civilization."