老朋友 (lǎo péng you) means “old friend; (slang) period; menstruation”. It is an HSK 2 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
他是我的老朋友。
Tā shì wǒ de lǎo péngyou.
He is my old friend.
Updated: 2026-07-18