It is not 5 vs 1, because the US has the entire 7th fleet parked on China's doorstep as well as multiple airbases as well, which are a permanent force deployed on China's immediate periphery.
QED. You cannot comprehend that 5>1. You don't mention China's vast fleet in the area as well.
There is nothing to be done, this won't ever resolve.
As I have written many times. When the Chinese, or those arguing in favour of the Chinese position, react, it is always different, things are never the same. China is special, there is always a caveat, or an excuse to claim that 'it is different this time and thus China gets special dispensation'. There will never be a similar situation, as it does not benefit China to compare things on an equal footing and demand reciprocity. They will always want an excuse to justify their actions.
There will never be any common ground, because anything anyone does, ever, is perceived always by China as being unfair, or a source of shame, or humiliation, or loss of dignity, or a provocation, or an act of aggression.
The only solution is capitulation to all that China wants and agree with them 100%. That is the only thing that will not have them reply as they have in the press this week.