Be prepared for a rainy day in the near future, take precautions before it happens, and have nothing to fear

Be caught off guard by antonym, sharpen one's guns at the last minute, and be eager to dig a well

Definition: disaster, disaster. If you are prepared in advance, you can avoid disaster.

The source of Shangshu said hit: "Everything is prepared, and it is prepared." "Zuo Zhuan Xiang Gong Eleven Years": "Be prepared for danger in times of peace, and be prepared for thinking."

Ji Si warned the people in Wenshang to build dikes and houses. Not three days later, it rained heavily and flooded, and Lumin ~. (Ming Feng Menglong's Biography of the Eastern Zhou Dynasty, seventy-eighth)