Here’s a novel idea. Why can’t they both use that region?
Both have shipped there without problem. Why does any of this have to be a problem now?
Let interests on behalf of any nations in the area drill there.
We have different nations drilling in the Gulf. They can do it too. Big deal...
None of this would be a problem if China would change it’s dirty diapers and join the rest of us in the 21st Century.
China doesn't want to go north, although Siberia beckons they do not want to get into a missile lobbing game with the Russians. The Russians will put a physics package in the nose cone quickly because they cannot match the Chinese for manpower.
They tried to bully Vietnam a few years ago and got a bloody nose. They see the vast Pacific as the place to expand. They can push Taiwan and Phillipines around because they are comparatively weak. The US has proven to be a poor ally. The US has already abandoned Taiwan. Will Washington go to war over the Spratley's or the Paracels? Doubtful.