https://www.scmp.com/news/china/science/article/3255351/nasas-dream-comes-true-china-plans-build-giant-rail-gun-launch-hypersonic-planes-space

Using maglev rail-assisted launch from an equatorial site could be really efficient if they get it built and working. Between the maglev trains and rail/coil gun testing, it seems like they are quickly developing similar technologies.