When did humans immigrate to Mars?

According to the official website of NASA, they plan to send four astronauts to the moon by manned spacecraft in 2020. Astronauts will build a base on the moon in four years, and by 2024, ordinary tourists will have the opportunity to live on the moon. First of all, the four astronauts on the moon can only stay on the moon for one week at a time for construction work, and the astronauts will continue to rotate and replace. It is estimated that by 2024, the lunar base will be basically completed, and people can live on the moon for up to six months. This important move: send people back to the moon and build a permanent base to prepare for landing on Mars.