běi​shàng​guǎng​shēn

major mainland cities

Senses

北上广深/ 北上廣深 běi​shàng​guǎng​shēn major mainland cities

Beijing, Shanghai, Guangzhou, and Shenzhen (the four major first-tier cities in mainland China)

References

abbreviation 北上广深/北上廣深 北京/北京
abbreviation 北上广深/北上廣深 上海/上海
abbreviation 北上广深/北上廣深 广州/廣州
abbreviation 北上广深/北上廣深 深圳/深圳