非常感谢你的协助。
李先生将于七月二日至七日去你市做具体安排，非常感谢你的协助。
Li will be in your city from July 2 to 7 to make specific arrangements and would very much appreciate your assistance.
李先生将于四月二日至七日去你市做具体安排，非常感谢你的协助。
Mr Li will be in your city from April 2 to 7 to make specific arrangements and would very much appreciate your assistance.
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