Eight-character wanzi

First of all, you asked the opposite question. It should be "time is expensive, and it will be regenerated later." Then when you refer to Ding You, Ding Hai, Gui Si, Gui Mao and other four days. "Shigui means the time of birth, and the corresponding earthly branches of these four days are Youshi, Haishi, Sishi and Maoshi.