祝你孤独终老万受无疆
[zhù nĭ gū dú zhōng lăo wàn shòu wú jiāng]
Translating directly, it means 'Wishing you endless suffering and to grow old alone'. In traditional greetings, 'Wish you a bright future with boundless blessing' (福寿无疆) would typically be said, but this one sarcastically twists this good wish into a curse.