MTL - The Troubleshooting Diary at Hogwarts - Chapter 24 Sunny 1st September (below)

Wang Yi gets a key, opening a door in 2022 will lead to 1982, and opening a door in 1982 will return to 2022.

Two very different great eras appeared before him:

Abundant dietary protection, developed industrial products, miraculous medicines, and explosive information, this is 2022.

Simple folk customs, rich wild resources, scattered antiques, and treasures of the age, this is 1982.

Traveling between these two eras, Wang Yi didn’t think much of it, he just wanted to live a good life.

- Description from novelbuddy

Maya prophesied that December 21, 2012 would be the end of the world. On this day, some people were anxious and afraid of not seeing the sun the next day. More people held a playful attitude and celebrated with their loved ones in the early morning night, waiting for dawn to celebrate their safe passage through the end.The next day, the sun rose as usual, and people only thought that God was joking with everyone, working and living as usual.But they were too happy too early.The end has already quietly arrived, but they have been adapted to the harsh environment, unable to see the green mountains turn into yellow soil, and flowers and birds disappear; Unable to see the clear river turning into a foul smelling canal, fish and shrimp are dying; Unable to see grassland turning into desert, land howlingAccording to the Observatory, there was a once-in-a-millennium meteor shower in the early morning of December 21, 2020. Many places can be seen with the naked eye, with young men and women rushing to tell each other, eagerly anticipating this romantic meteor shower.At midnight, the long-awaited miracle finally appeared. The moon, which had been hard to see for a long time, descended like a silver plate, clear and bright, right in front of meBut then people were extremely frightened. According to the lunar calendar, this day is the Winter Solstice Festival on the seventh day of the winter lunar month. How could there be a full moonThis is a beautiful miracleIt's still the beginning of the nightmare

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy