Infinite Switch

After experiencing the threat of evaporation, the earth's population dropped sharply, leaving only those who worked underground and a few people alive. At the end of the Lunar New Year, humans discovered a pillar of light whose energy could not be accurately measured, so they built multiple pipes around it to utilize the energy, and then developed a prototype of an upgraded elevator. Four living levels are established based on the elevator, and the population is divided into four stages according to age to start the new calendar. In the 365th year of the New Earth Calendar, the 365th World Conference was held to deal with the situation of population decline and at the same time launched the relocation plan.