单身贵族 (dān shēn guì zú): Refers to single people who enjoy high incomes and live luxurious lifestyles.
空巢老人 (kōng cháo lǎo rén): Empty nesters, usually referring to elderly parents whose children have grown up and moved out.
双职工家庭 (shuāng zhí gōng jiā tíng): Dual-income families, where both parents work to support the household.