In 1978, after missile expert Song Jian went abroad for exchanges, he and Tian Xueyuan and others used mathematical models to calculate, claiming that if China did not control its population, it would reach 4.264 billion by 2080; Tian Xueyuan also proposed that China's population ceiling should be 650 million to 700 million, providing a basis for family planning.
Evidence EVIDENCE
Sources 3 · Archived 0
SourceTypeReliabilityLink
多伦多方脸
2026-10-25 06:38 · 多伦多方脸 发布视频：方脸说：计划生育的债务正在到期！计划生育，一个荒诞政策的前因丨影响丨后果丨未来！中国人口危机！
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维基百科：三年困难时期
2026-10-25 06:38 · 2012年4月，《人民日报》甘肃分社社长林治波通过新浪微博否认三年困难时期饿死上千万人，引發部分网友激烈抗议。
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维基百科：三年大饥荒
2026-10-25 06:38 · 三年困难时期，又称三年大饥荒、中国大饥荒、三年自然灾害，是指中华人民共和国于1959年—1961年间因为三面红旗运动而发生全国性饥荒的一段时期，也有学者将1958年、1962年划入饥荒时期。
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Context CONTEXT
Cause
Not recorded yet
This event
In 1978, Song Jian, Tian Xueyuan and others calculated that China's population would reach 4.264 billion by 2080 and proposed a population cap of 650 to 700 million
1978 · Reported
Effect
Not recorded yet
Coverage of this event COVERAGE