Arc 4The Great Migration Begins
Zhang Tianyuan and Elder Zhou brought the leaders of the “2012” spacetime into the Mutual Aid Society and secured a global plan to evacuate humanity before the apocalypse. As preparations began, Zhang helped rescue three stranded astronauts, while Charlie remained suspicious of the Society at a resettlement camp.
- Zhang Tianyuan and Elder Zhou used parallel-spacetime fighters to pressure Thomas, then revealed the Mutual Aid Society and offered his country access to a Spacetime Tunnel under strict mutual-aid rules.
- Thomas joined the Society, but his Ark Alliance allies rejected the migration terms, so Carl helped gather their families and leaders who would support the plan while opposition groups tried to remove Thomas.
- Carl publicly backed Thomas, and Thomas, Takemura, and other leaders signed agreements to join the Mutual Aid Society and prepare their countries for migration.
- Elder Zhou and Zhang Tianyuan announced the approaching apocalypse to the world, opened a Spacetime Tunnel before a global audience, and promised to relocate everyone rather than abandon anyone.
- The Society began constructing spacetime railway infrastructure and laid out preparations for vaccines, supplies, and staged evacuations, while Charlie was found near Yellowstone and given a membership application.
- Zhang Tianyuan brought Carl and other representatives to the Legend Spacetime resettlement camps, where Instructor Yin showed them how residents managed utilities, disease prevention, and Darkseeker threats.
- Zhang Tianyuan and the camp's specialists launched a mission to retrieve Hill, Mike, and Padalka from the International Space Station, then opened a Spacetime Tunnel so the astronauts' return could be broadcast across both spacetimes.
- After the capsule landed, Zhang Tianyuan transported the astronauts and rescue team to a shelter, where doctors found that the three had multiple fractures but no other life-threatening injuries.