http://www.usatoday.com/story/news/politics/2015/05/13/china-warning-us-south-china-sea-islands/27229987/%3E Looks like the US maybe making it's position a little more forcefully than it had previously.
Nothing happens in a vacuum. "China getting panicky over U.S.-led Pacific trade deal" http://www.marketwatch.com/story/china-very-worried-about-us-led-pacific-trade-deal-2015-05-21
Yes, interesting. mobile sea basing platform and logistics node http://foxtrotalpha.jalopnik.com/is-china-building-their-own-mobile-landing-and-sea-basi-1710217637