LEP operated around 209 GeV in 27Km so this Chinese proposal of 240 GeV at 52Km is.. underwhelming. Realize things like labor cost less in China but this isn't a high rise they are making. LHC cost amost $5B to build. Where is China getting the magnets? I'm not sure US export controls will allow a sale. And then there are those pesky detectors which are technological marvels themselves.
Still unfortunate that we can't scale up anti-proton production to levels necessary for high luminosity.