《资治通鉴·宋纪·宋纪三》
崔浩善于根据天象预告未来，常把生铜放在装有醋的容器中，夜间观天每每有所发现，立即用那块生铜在纸上写字，记录异象。
浩善占天文，常置铜铤于酢器中，夜有所见，即以铤画纸作字以记其异。
Cui Hao was good at predicting the future based on celestial phenomena. He often put raw copper in a container with vinegar, observed the sky at night and made discoveries, and immediately used the raw copper to write on paper to record the strange things.