How did the US Shuttle Diplomacy changes the cold war?

After the Cuban missile crisis both superpowers experienced the horror of a possible nuclear catastrophe and mutual side wish the scenario do not happen twice.

Especially since the creation of communist China counterweigh the balance of power in the Asian region, triangular diplomacy emerged. US had the ping-pong diplomacy with China. Also there were numerous back-channel negotiations between the three powers.

My question is how did the diplomacy and emergence of Communist China change the Cold war? I need some learnt historians insight and opinion on this. Thanks.