I don't know if it actually has any connection with the Vodapod, it does not look like an exact copy. There aren't many ways a torpedo with a rocket stage would look like. Old technology or not, its still a useful technology, i mean what can go wrong with a rocket boosted torpedo.
If you were refering to the pic, its Vodopod, not some chinese derivation of it, nor is the pic taken anywhere near china.
The missile, RPK-6 is old design, but the concept isen't. For example the same burey's 91RE1/2 are basicly the same concept, torpedo-warhead powered by ballistic rocket. The Chinese own CY-1 is basicly similar from the concept and if they were to continue to developt it, I assume it would be quite follow the same overall idea.