美國的比例系 一對夫妻 5 年嘅人工就可買一間屋 ， 不過要係中國需要 30 - 40 年先至做到 因為房價高漲 。
In United States, the rate is that a couple can buy a house with five years' salary, but in China it would take 30-40 years to do so because of high housing prices.