计划生育—维护中华民族安全的无形长城

中国一直成为人口超级大国是源于所处的地理环境和自身的文化。中国历代兴衰与人口数量有特定关系，众多人口形成坚固的维护本民族安全的“人口长城”。人口增加到一定程度又会引发动荡造成周期性危机。认为计划生育是当今维护中华民族安全的无形长城。

That China always be the population superpower is to originated from its geographic conditions and sells culture. The Chinese past dynasties rose and feh has specially appointed relation to do with population quantity, A large population to form ＂a population like the Great Wall ＂ was maintaining the national security , Once the population increased to cetrain de- gree ,it would initiated a turbulence so that cause the cyclical crisis. The paper think that family planning is like a intangible Great Wall which defending the Chinese nation＇s safety.