They are surface to surface. Or at least they can be.
Both the Chinese missile you mentioned and these ones have the sensors in the launch vehicle.
In the case of the Russian missiles they are laser beam or radio guided. As for using fibreoptic cables, no long range missile uses such a system.
![h6Ai1MO.png](https://i.imgur.com/h6Ai1MO.png)
![PaObVUO.png](https://i.imgur.com/PaObVUO.png)
Both the Chinese missile you mentioned and these ones have the sensors in the launch vehicle.
In the case of the Russian missiles they are laser beam or radio guided. As for using fibreoptic cables, no long range missile uses such a system.