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.

China trades with pretty much everybody, don't read too much into that.

China is not allied with Russia and China is unlikely to engage in sabotage like this because they stand nothing to gain from it.