桑土绸缪

Explanation: "Poetry Bin Feng owl ':' not the cause of days of rain, Che Bisang soil, household preparations to establish lattice window." Zhu Xi _set_ pass: "soil, sound Du. Sang soil, mulberry root skin and days ... I also did not when the rain, and mulberry root to take the gap to lingering nest hole, so strong, to prepare for the risk of rain. "After the submitted" Sang soil preparations to establish "Yu hard business, take preventive measures. 　　Source: "Poetry Bin Feng owl" is not the cause of days of rain, Che Bisang soil, preparations to establish lattice window households. "Zhu Xi _set_ mass of soil, sound Du. Sang soil, mulberry root and skin are ... I do not rainy day when the nest to take the mulberry root of the gap points to lingering, so strong, to prepare for the risk of rain."