Is China working on something like this. Coz this seems to be revolutionary if implemented successfully as it negates 1st stage for launch system.
It is useful in a vacuum like on the Moon or near vacuum on Mars where chemical propellant is hard to produce but electricity is much easier to get. It is a stupid idea on earth, stupid in that it wastes large amont of energy in fighting air friction, probably larger waste than saving.
It is not revolutionary in any sense, it is a variant of catapult which has been used for thousands years.
NASA has been working on the idea since 1980s and still not using it anywhere because it does not work on earth. Googling tells me that NASA is involved in this company. So this company just continue what NASA just dropped, or more likely NASA just offloaded something useless in the near future to some super rich people who has no better place to spend their money. There is no point of continuing such effort because they are fighting the problem (air resistance) that does not exist in its realistic application environment (outer space).
As about China, there is talk about electromagnetic space launch in a 2016 paper by Ma Weiming, the Chinese EM catapult designer. It was in conceptual/feasibility study, that is to find its use-case and needed tech, nothing in engineering phase. I'd say that China isn't going to build anything on earth, but probably use it on the moon base some time after its completion which is IMO at least after 2035, likely closer to 2040.
It is too early and premature to even talk about application (outside earth atomasphere) of such technology. As always like all the American "innovative" private space companies, creating sensational hype and visibility is the first priority, engineering value and practicality come second place.
