Lunar migration technology

NASA plans to start building a lunar base in 2020, carry out small-scale short-term migration of people on Earth, and complete permanent settlement within four years. According to the Associated Press and New York Post, according to the plan, the future moon base will be located at the south pole of the moon, because more solar energy and hydrogen can be obtained there. This will be the first step for mankind to resume manned space exploration in the solar system and prepare for landing on Mars in the future.