Escape The Solar System With Millennium Technology

Having obtained all the science and technology of the future mankind after a thousand years, but was told that a neutron star will destroy the earth in 80 years.
So Wang Lei used future technology to build robots, build space elevators, develop the solar system, and build immigrant spacecraft.
But there are always people who are jealous of others. In order to protect themselves, Wang Lei took out electromagnetic guns, Titan mechas, exoskeleton armors, space-based laser weapons and other future weapons. Teach them that not everyone can take things.