Obviously, during the Soviet-Afghan war China didn't want the Soviets there either

The Peshawar Seven insurgents received military training in neighboring Pakistan and China,^[8] as well as weapons and billions of dollars from the United States, United Kingdom, Saudi Arabia, and other countries.^{[2][3][4][8][27]
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1. Soviet–Afghan War - Wikipedia, the free...

   en.wikipedia.org/wiki/Soviet_war_in_AfghanistanCached

   The Soviet–Afghan War lasted over nine years from December 1979 to February 1989. Part of the Cold War, it was fought between Soviet -led Afghan forces against ... 

   
   

   
   

   I wasn't aware before that China also didn't want the Soviets in Afghanistan from 1979 to 1989 either. So, obviously China contributed to the collapse of the Soviet Union too by this when this war bankrupted the Soviet Union because of all the millions of dollars of planes, helicopters and tanks that were blown up or shot down in pieces at that time.