Whatever technology SpaceX has developed to land those booster rockets should never be shared with anyone, outside of the USA.
The ability to land the boosters and reuse them, saves an incredible amount of money, the technology must be fairly difficult to reproduce since no other company or nation that launches rockets has been able to duplicate it.
China is working on this in a fanatical fashion. They desperately desire this technology, and their own testing has yet to succeed. I suppose they will eventually figure this out, or outright steal it.
There are many reasons that China fawns over Musk when he visits. China will either steal that tech, or buy it if their own efforts continue to underwhelm.
#2 The clintons and bidens and Loral company would sell it to our enemies in a heartbeat.
SpaceX is launching, and almost always recovering, an orbital launch at a rate faster than once per week.
NOBODY else comes anywhere close to their operational tempo.
On a barge at sea, no less. Amazing!!
To me, this is more entertaining than the lift off and space station docking.
Whatever technology SpaceX has developed to land those booster rockets should never be shared with anyone, outside of the USA.
If Bubba were President, the chinks would already have it.