Smith,
I would hereby invite the members of Frankfurt delegation totally 2 persons (listed attachment) led by you, to come over to China for 20xx ABC Exposition, which is to be held at Beijing during October and November 20xx. Please make the necessary arrangements for your delegation to arrive in China. During the exposition, you will stay here for 7 days. All your expenses including international air tickets, local transportation, accommodations, medical insurances and all other related expenses during your stay here will be paid by yourselves.
We are looking forward to greeting you in Beijing very soon.
Yours sincerely,
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