You don't have to wage a war upon a broken treaty. China even complained that UK was considering giving path to citizenship to British National Oversea passport

You don't have to wage a war upon a broken treaty. China even complained that UK was considering giving path to citizenship to British National Oversea passport holders. Many things can be done. Point is, an international treaty is broken and it doesn't make sense to justify because "china is big and powerful", we need to hold China accountable (and US/UK/western countries definitely have the power to do so)