都是老同学
dōu shì lǎo tóng xuéCommon spoken expression used by native Chinese speakers in daily life.
[Authentic Cinema Evidence Base]
(2 clips)
00:02
(愣着干什么呀 都是老同学 随便坐) ── Previous context
“Yes, we're all schoolmates. Friend me on WeChat.”
00:02
(学长好) ── Previous context
“Why are you standing there? We're all schoolmates. Sit down, please.”