What are some examples of taking preventive measures?

There is a poem named "Owl" in the allusion 1 in The Book of Songs, which describes a mother bird who has lost her cub and is still diligently building a nest. There are several poems: "It's raining in the morning, so you can keep your family for a rainy day. Today's people dare to insult! " It means: before it rains, wrap the gap in the nest with mulberry root bark as soon as possible. Only when the nest is strong will we not be afraid of people's invasion.

Later, everyone extended these poems to "prepare for a rainy day", which means that everything should be prepared in advance to avoid being in a hurry.

Allusions 2 After the destruction of the King of Wu, Uncle Cai and Uncle Huo were sealed in the suburbs of Shangdu to monitor the adherents of Yin, and they were named three supervisors. Qiu, who succeeded to the throne at a young age, was assisted by his uncle, which caused dissatisfaction among the three supervisors. Guan Shu and others spread rumors that the Duke of Zhou was not conducive to becoming a king. In order to avoid suspicion, Duke Zhou moved to Luoyi, far from the capital. Soon, others colluded with Wu Geng, the son of Yin. Duke of Zhou was ordered to crusade, punish Guan Shu, kill Wu Geng, release Cai Shu and collect Yin Yumin. After the chaotic Zhou Dynasty, he wrote a poem "Owl" and became king. His poem said: "When it doesn't rain, peel off the mulberry skin and mix it with mud to tie the doors and windows. How dare you who live next door to me bully me? " Duke Zhou's poems are ironic. He hopes that when he becomes a king, he will formulate measures in time to stop rebellion and conspiracy. Although the king is not satisfied, he dare not blame him.