I'd consider the serious escalation of offensive (cowardly) acts were carried out by Russia many many years ago repeatedly, increasingly, throughout Europe (elsewhere too), with mild consequences. Got seriously unabashed escalating further. Being cautious with the nazi Germany blew into the face of the World, will definitely not work with the imperialist Russia either. China acts on behalf of Russia here - Russia being coward for open confrontation with anyone (believed by them) able hitting back hard. China has secondary benefits for self as well.