"High-altitude winds between 1,640 and 3,281 feet (500 and 10,000 meters) above the ground are stronger and steadier than surface winds. These winds are abundant, widely available, and carbon-free.
"The physics of wind power makes this resource extremely valuable. “When wind speed doubles, the energy it carries increases eightfold, triple the speed, and you have 27 times the energy,” explained Gong Zeqi "
I feel like all the responses you’re getting are probably generally correct in the context of wind at/near ground level. But I feel like sticking a bunch of these in a JET STREAM is (maybe?) an entirely different matter. Or at least it could be, and I too am curious what the potential ramifications are.
Jet stream winds are not just wind like any other, are they? Various jet streams have serious impacts on weather. If they harnessed and substantively bled off the Pacific jet stream, are there potentially grave consequences on the already variable El Niño and La Niña oscillation? If it could cause serious shifts in the weather, that would affect the livability of areas, create more dangerous weather conditions, and impact farming way around the globe from their wind farm installation.
Maybe none of these are genuine scientific concerns, but frankly I don’t trust China to do the science for the rest of us. Pretending these are genuine concerns, say they screw something up - it probably doesn’t too seriously impact Chinese weather as they harness the jet stream winds right at the point where it leaves their airspace. But the ramifications for the rest of the world could then be dire, and I’m not sure that is remotely a concern for them. Could be an economic advantage even. Two birds, one stone.