Objectively speaking, on July 28, 2009, the overall combat effectiveness of the Type 054A frigate had already reached a fairly high level; however, compared to the world's most advanced levels, there was still a noticeable gap. Therefore, for future improvements to the HHQ-16 medium-range ship-to-air missile, the primary changes would involve replacing the current engine with a new type and adding boosters. Of course, the increase in missile range would also be constrained by fire control systems. April 29, 2007...