dear sir/madam:
[location], on [date] from to p.m.
see you on [date].
yours sincerely
[name]
invitation for business:
july 29, 20xx
, vp sales
corporation
(address)
please use this invitation letter to apply for your visa to china.
we are all looking forward to seeing you soon, and should you have any questions, please feel free to inform me.
yours truly,
vice president sales