ill keep looking for the C-701 but i found a variant of the missile family C-705KD in the Dubai? air show
(the seekers are switchable as far as my sources state)
One of the first upgrades included the incorporation of infrared guidance so that there is a dual guidance system similar to that of the Taiwanese Hsiung Feng II missile. Imaging infrared seeker and a television seeker similar to that of the C-701 anti-ship missile became available later. The imaging infrared seeker is reportedly derived from the imaging infrared seeker technology developed for Chinese air-to-air missiles. These three seekers are interchangeable with the original radar seeker, and can be fitted at naval bases rather than the factory.