Cf. Anne Applebaum, "When China starved", in The Washington Post, August 12, 2008. The major event in China during 1959–1961, due mostly to failures of government policy, was the great famine that claimed 36 million lives. Stories eventually circulating outside the PRC were confirmed decades later with Yang Jisheng's book Tombstone (Hong Kong 2008).
"China admits combat in Vietnam War" in The Washington Post, May 17, 1989. The PRC, in addition to the 320,000 troops, also spent twenty billion dollars to support the war efforts of the North Vietnamese Army and the Viet Cong.