贴春联 (tiē chūnlián, pasting Spring Festival couplets) is a key tradition during Chinese New Year. Red paper with auspicious phrases is pasted on both sides of the door for good luck.
usage
In modern Chinese, 贴 is also used for digital 'posting': 发帖 (fā tiě, to make a forum post), where 帖 (tiě) is a different but related character meaning 'post/note'.
