Pakistan's reputation to quote a US diplomat is "of an ungrateful dog that repeatedly bites its master". Secondly Pakistani currently has better Military status compared to India. I am not sure what the exact phrase is - its applies to countries who are not in NATO but get NATO style access to latest weaponry. Something Pakistan has and India has wanted.
Regarding China real life experience in New York and Geneva has proven that they do infact cherish our support. If I ever have the time I will regal you with my experiences.
I wouldn't be concerned too much by what the US diplomats say neither should you. As regards weaponary ..... sorry for using the phrase .... but US will sell its soul if it is in its interest. So India does not have to worry about that ..... they just signed off on nuclear deal which no one in the world wanted to give to India. So any weaponary , if India needs, wont be to far in the future.
Regarding the Chinese support ..... I am sure they support Pakistan in New York & Geneva and will continue to do so ....... Actions speak louder then words .... general Niazi was waiting for the Chinese to at least flex its muscles (which US did try with its battle group). But you have to remeber at the end of day every country is for itself. At that time if it does not suit China to support Pakistan .... they will say Au revior. India and Pakistan HAVE to live next to each other ... they like it or not ...... they have to either put up or shut up