AFAIK, there's three things the PLAN lacks for such long-range power projection: long range air superiority, seafaring troops carriers/LHDs/LSDs and blue-water logistics (underway replenishment). Loading things on barges isn't enough if they aren't unable to cross the Pacific.
That's what they are apparently busying themselves at, and why I said that before at least 10 years, there's no chance they get them.
Going on a tangent here, there should be number of macropolitics/economics what-ifs that could lead to a possible China-invades-CONUS...
