If you don't know the name of the person you are writing to, start business emails with either of the following:
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Dear Sir,/Dear Madam,
×ð¾´µÄÏÈÉú,/×ð¾´µÄŮʿ,
Dear Madame, is wrong.
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If you don't know whether you're writing to a man or a woman use:
Èç¹ûÄã²»ÖªµÀÊÇд¸øÏÈÉú»¹ÊÇŮʿ£¬¿ÉÒÔд£º