《管子·水地》
所以，数百年的涸泽，而山谷没有移位，水源没有断绝的地方，就要产生庆忌。
故涸泽数百岁，谷之不徙，水之不绝者，生庆忌。
Therefore, after hundreds of years of drought, in places where mountains and valleys have not shifted and springs have not dried up, Qingji will be born.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 故涸泽数百岁，谷之不徙，水之不绝者，生庆忌。 [/INST] Therefore, after hundreds of years of drought, in places where mountains and valleys have not shifted and springs have not dried up, Qingji will be born.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 故涸泽数百岁，谷之不徙，水之不绝者，生庆忌。
user
Therefore, after hundreds of years of drought, in places where mountains and valleys have not shifted and springs have not dried up, Qingji will be born.
assistant