HY-2

Commonly labelled as the “Silkworm”, the HY-2 Seersucker is a re-engineered and stretched HY-1 Silkworm, and remains one of China's most widely exported weapon systems. The ~1.5 metre fuselage extension provides ~700 kg larger fuel capacity than the Styx series, roughly doubling range to ~110 NMI. The weapon retains the 513 kg full fuselage diameter shaped charge warhead of the original Styx. The missile will cruise at 300 - 1,000 ft AMSL until its seeker acquires the target, upon which it descends to ~25 - 100 ft AMSL, depending on variant, for the terminal homing approach to the target.
More: http://www.ausairpower.net/APA-PLA-Cruise-Missiles.html#mozTocId21144