Today, the space industry continues to hype up, and there has always been controversy in the market over whether nuclear fusion or space power should be used. Musk is a space enthusiast, and today the market has also chosen space photovoltaics. The essence here is that Musk starts from first principles and physical principles: can humans make a big pot of paper to cook rice? This is the biggest problem facing nuclear fusion on Earth. In recent interviews with Academicians He Zuoxiu and Peng Xianjue, they firmly believed that human engineering technology is currently unsolvable. At present, the lighter ignition has been completed, but the strongest material on Earth is like a paper pot facing this lighter in the face of neutron energy. Unless there is a new material revolution, discovering elements that the Earth has never had before or synthesizing some special materials. This relies on unknown luck, lagging behind the speed and engineering capabilities of space deployment. After all, Musk's stainless steel rocket has already soared like a monkey, and can be launched in batches soon.