Daily Chinese Idiom Guessing Game
Refers to vast areas of China, especially the regions north and south of the Yangtze River.
指靠临长江中下游两岸的广大地区。
清·恽敬《上曹俪笙侍郎书》而大江南北，以文名天下者，几于昌（猖）狂无理，排溺一世之人，其势力至今未已。”
People from all over the country, from the great river's north and south, gathered for the festival.