Lǎo péngyǒu jù zài yīqǐ, hǎikuò-tiānkōng de liáo le yī wǎn.
Old friends got together and chatted about everything under the sun all evening.
Tips
history
From the Tang poem 《暗离别》 by Liu Shiyao: 青鸾脉脉西飞去，海阔天高不知处 - the blue phoenix flies west, sea wide, sky high, and no one knows where. The phrase later shifted from 'vast unknown distance' to 'open-mindedness' and 'unrestrained chatter.'
culture
Also the title of Beyond's 1993 Cantopop hit 海闊天空 - one of the most recognized Chinese-language rock anthems, symbolizing freedom and ideals. The phrase carries this cultural weight in casual use.
