燕雀相賀

Simplified: 燕雀相贺

yànquèxiànghè ㄧㄢˋ ㄑㄩㄝˋ ㄒㄧㄤˋ ㄏㄜˋ

    • lit. sparrow and swallow's congratulation (idiom) fig. to congratulate sb on completion of a building project
    • congratulations on your new house!

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Sources