Zhang Ying (
张英), a Grand Secretary under the Kangxi Emperor, got a letter from home about a wall dispute with the neighbouring Wu family. He wrote back
千里修书只为墙，
让他三尺又何妨 ('a letter from a thousand li, all for a wall? Let them have three feet, what harm is there?'). His family moved their wall back three chi, the Wu family did the same, and the gap became a lane six chi, about two metres, wide.
