WI Zhou Enlai assassinated in 1955?

What if the PRC Premier Zhou Enlai is aboard Air India's Kashmir Princess when it crashes into the South China Sea due to a bomb explosion on 11th April 1955?

What are the implications for the PRC internally? And what about the international stage and the Cold War?

For an added twist, what if the details leak out internationally about CIA involvement in the bombing, say by 1965?
 
The Sino-Soviet Split is quickly papered over, and North Vietnam and North Korea get significant aid increases.
 
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