"It came shortly after Mao's death in September of that year, and by the end of 1978 Deng had outmaneuvered all of his rivals to become China's "paramount" leader. He had already by then turned the tables on his predecessor by claiming that Mao had been right seventy percent of the time and wrong thirty percent: this now became party doctrine. Among the "right" things Mao had done were reviving China as a great power, maintaining the Communist Party's political monopoly, and opening relations with the United States as a way of countering the Soviet Union. Among the "wrong" things was Mao's embrace of a disastrously administered command economy. With this pronouncement on percentages, Deng won himself room to pursue a very different path. It involved experimenting with markets at local and regional levels, after which Deng would declare whatever worked to be consistent with Marxist-Leninist principles. Through this bottom-up approach, he showed that a communist party could significantly, even radically, improve the lives of the people it ruled—but only by embracing capitalism. Per capita income tripled in China between 1978 and 1994. Gross domestic product quadrupled. Exports expanded by a factor of ten. And by the time of Deng's death in 1997, the Chinese economy had become one of the largest in the world. The contrast with the moribund Soviet economy, which despite high oil prices showed no growth at all in the 1970s and actually contracted during the early 1980s, was an indictment from which Soviet leaders never recovered. "After all," the recently deposed Mikhail Gorbachev commented ruefully in 1993, "China today is capable of feeding its people who number more than one billion.""
January 1, 1970
https://en.wikiquote.org/wiki/Chinese_economic_reform