Yi Peng 3 crossed both cables C-Lion 1 and BSC at times matching when they broke

It was crossing right on time for the interruptions, a Russian officer was on board, it slowed down while crossing, no other ships were slowing down in that area during that time (rulingnout headwinds) - it cannot get much clearer. China is now participating in hybrid warfare against Europe (unless they present stronger evidence against this assumption)

I don't know if the evidence is conclusive, but I do think we can say China is supplying Russia with military hardware and supporting them in other ways. So.. it's possible.