It is quite an exciting era to be alive in - both because of the escalating conflicts between nuclear powers but also because we're welcoming another billion+ humans into living in an advanced industrial society. Hard to believe that 1970s China has come this far. Hopefully India follows close behind.
China is already very advanced, I’d say that when it comes to reasonably large countries (so ignoring city-states) it is one of the most tech/industrially advanced countries out there, if not the most advanced. For example the US might still have some advances in tech but basic stuff like speed/rail systems are just not up to par, while countries like Japan or Germany might still be ahead of China in some specialized…
Now? London spent over 40 years planning The Elizabeth Line before the first shovel was put in the ground. HS2 our second true high speed line look 20 years in planning, and they're still squabbling. Upgrading the country from an existing phone network of copper cables around since the 1900s will have taken 30 years to go fully fibre.
It might be interesting to imagine if China modernized in the 70s, how it might be now.