微雨燕双飞
[wēi yŭ yàn shuāng fēi]
'Light rain; swallows flying in pairs' comes from a poetic phrase describing the scene after light spring rain, where pairs of swallows are seen flying together. Swallows symbolize spring, hope, joy, good weather. They're also traditionally considered signs of loyalty because these migratory birds will return to old nesting places year after year, representing a longing reunion or pure, enduring love.