Place + 人口 + Verb
The noun 人口 (rénkǒu) means "population" and refers to the number of people in a region or country. It is a key term in demographic and social discussions. For example, 人口达到八十亿 means "the population reached eight billion."
中国的人口超过了十四亿。
Zhōngguó de rénkǒu chāoguò le shísì yì.
China's population exceeds 1.4 billion.
这座城市的人口在十年内增长了一倍。
Zhè zuò chéngshì de rénkǒu zài shí nián nèi zēngzhǎng le yī bèi.
The population of this city doubled within ten years.
很多国家都面临人口老龄化的问题。
Hěn duō guójiā dōu miànlín rénkǒu lǎolínghuà de wèntí.
Many countries are facing the problem of an aging population.