外商来华邀请函-条据书信 formal visa invitation格式 公司抬头 to * attention: * a formal visa invitation dear sir or madam: we are very pleased to invite mr. * come to our factory for visiting and business negotiation. the business trip will start from 18th april XX . and because the long business co-operation in future between *对方公司名 and us, they will come to china for many times. please note, however, that we dont assume any legal or financial responsibili