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The Nixon Mao meeting of 1972 now seems a very long time ago. Little is mentioned here in this WSJ report on what was happening inside China in 1972. The Great Proletarian Cultural Revolution had severely divided the Communist Party. This was followed by the Lin Piao episode in which the defense minister clashed with Mao leading to a complete loss of confidence in the stability of the leadership. China sought the meeting and Chou-en-lai, premier and Mao's minister for foreign relations, was eager to seek a new relationship with the US. The period 1960-1970 had pushed China back 10-20 years in its effort to develop an industrial economy. 
The event is presented as one in which the two countries were meeting at the same level after the Korean War, which was not the case.

This report says it was the $3 trillion in US and foreign investment that helped an economy the size of India in 1972 to emerge into what it is today, much larger than India. This report goes on to cite Foreign Affairs and other authors who write that Mr. Kissinger and Mr Nixon saw this as a self-promotional event in contrast to the situation Chou-en-lai, the Chinese premier faced during that difficult time in China's history.