风不大去找你雨不下去等你
[fēng bù dà qù zhăo nĭ yŭ bù xià qù dĕng nĭ]
It means 'I'll go find you on a day without strong wind, and I'll wait for you under the rain'. It reflects someone's persistence in love and commitment in any circumstances. Even if conditions are adverse, such as heavy rain, they still insist on meeting you.