痴心一心独心换回你不忠心
[chī xīn yī xīn dú xīn huàn huí nĭ bù zhōng xīn]
Translating to 'Devoted Heart Expecting Disloyalty Back', it indicates a state of giving sincere heart while anticipating betrayals in return – conveying a sense of hopelessly being committed or loyal towards an unfaithful party.