1. The occurrence of overpopulation in China.
2. Why China’s overpopulation occurs.
3. The implementation of birth control in China.
A—overpopulation B—under population
C—working population D—population waiting for employment
E—urban population F—rural population
G—population reproduction H—population increase
I—population decrease J—population base
K—population distribution L—population density
M—population quality N—population pyramid
O—population statistics P—population theory
Q—population studies
A--overpopulation
B--under population
C--working population
D--population waiting for employment
E--urban population
F--rural population
G--population reproduction
H--population increase
I--population decrease
J--population base
K--population distribution
L--population density
M--population quality
N--population pyramid
O--population statistics
P--population theory
Q--population studies
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