sites like Global Security is in the business of making money, not to provide accurate information. Minimize expenses (use cheap interns to write articles), maximize profit (media clients can attract more audience with a story about the newest big scary Chinese warship such as Type 055).
It is not a coincidence that FAS and Global Security websites are remarkably similar in both format and content. The same man John Pike is behind both sites. One sales to "liberal" clients by calling itself an arms-control organization. The other sales to "conservative" clients by simply using keywords like CHICOM. Smart man, got both markets covered.
If their goal is to pump up the scary Chinese Navy, then I'd counter that this writer is a double agent (or incompetent "scholar" from our degree-mill colleges) working very hard to understate the Chinese Navy's capability. For example, claiming that only 12 Chinese warships are equipped with SAM systems.