50 years ago, Pakistanis felt their prospects of militarily overwhelming India was a reality by getting both China and US on their side
Kissinger's Secret Trip to China
Ironically, this went horribly wrong with not single PLA soldier or PLAAF fighter coming to aid when their nation got torn apart in most humiliating way
India had already anticipated potential Chinese interference and had Soviets countering them
INDO-SOVIET TREATY OF 1971
Noticing Chinese unwillingness to save their south asian scapegoat, India went further ahead tested its nukes and within one year integrated Chinese claimed Sikkim.
Nearly a decade and a half later once again Pakistanis raised their hopes of Chinese rescue again with their failures in Siachen during 1987
Operation Rajiv
However Chinese attempts to take advantage of Siachen were countered by rapid deployment of Indian forces thanks to a capable Indian general Sunderji
Sumdorong Chu standoff
Today, the prospects are even more bleak with establishment of AUKUS, shifting Chinese focus towards the east
Current Pakistani elation at Indo-Chinese border skirmishes is a cold war hangover which left a major wound both physically and mentally for them and they are attempting to recover from it to this day