Those are transporter erector launchers for the YJ-62 anti-ship cruise missile. They are deployed as shore-based defensive batteries. The coloring is likely i

Those are transporter erector launchers for the YJ-62 anti-ship cruise missile. They are deployed as shore-based defensive batteries. The coloring is likely intended to make them blend in with the sky (when viewed from the ocean surface) and the surf zone (when viewed from above). As for deploying rocket artillery on ships, that wouldn't be a good idea. Firing platforms need to be better secured in order to be used from a ship. Regardless, China doesn't have many amphibious assault ships with significant clear deck space.