sky clears after rain / new hopes after a disastrous period (idiom) / every cloud has a silver lining (idiom) / see also 雨過天青|雨过天青[yu3 guo4 tian1 qing1]
sky clears after rain / new hopes after a disastrous period (idiom) / every cloud has a silver lining (idiom) / see also 雨過天晴|雨过天晴[yu3 guo4 tian1 qing2]