While you guys are so exciting regarding its God speed, look I found what; in and Indian forum they claim that the speed is only propaganda, its actual speed is not even Mach 1!!!
PS. I quoted someone's claim doesn't mean I agree to that. To my untrained eyes, the CM-400AKG though with long or short middle fins are not fold-able while they claim it can be folded.
I believe the Indian forum site you've quoted is referring to various interations of the Chinese YJ-82/3 series, the analogue in the west being the French Exocet and US Harpoon, a subsonic sea-skimmer, anti-ship missile. That's got nothing to do with the CM-400AKG!