"Through 2020, the US military deployed 3 CSGs, 2 ARGS, mulitiple nuclear subs, nearly 1,000 sorties of reconnaissance planes and 17 batches of strategic bombers to the SouthChinaSea, whose intensity, scale and duration were rarely seen in recent years."
So much for 'Chinese threat'. How many naval patrols and strategic sorties had China conducted off the coast of California or in the Gulf of Mexico in 2020? Zero. At every juncture America is constantly trying to create tensions around and within China. USN in the SCS, and around Taiwan. US operatives in HK. The Quad, and so-on. And China is guilty about going crazy with its military buildup and modernization?
The biggest threat I see from the US deployments in the SCS are in particular, their nuclear submarines. They won't reveal the types, but my guess is that Ohio SSBNs could be among the mix. Not only can the US bring the might of its strategic nuclear arsenal at China's doorstep. The other nuclear submarines can do a lot of intelligence gathering of China's naval assets. They could be shadowing Chinese ships and submarines to record their acoustic signatures. Powerful tools to for every US nuclear submarines. They could use it to program their torpedoes, or more importantly to upload them it into naval mines. Worse, they could share it with other anti-China countries like Japan, or maybe Vietnam. For me, this should be an urgent priority threat for the PLAN.
But unfortunately, very little is said about US submarines in the Chinese media. I hope that the PLAN is not as ignorant, and is at least trying to track US submarines in SCS. Their acoustic signatures need to be recorded. It'll be a very important, but extremely challenging task based on China's current capabilities. China's current nuclear subs are still too noisy, and its surface assets could be heard from miles away. Only China's modern conventional subs, and UUVs are the closest things that it has that could theoretically sneak up on US nuclear subs. Assuming that they can be found first. The SCS is not the Pacific ocean, so trying to look for US submarines there is not a truly insurmountable task.