客人参观完工厂后，想写封感谢信，同时表明与之合作的诚意，应该怎么写（英文）？

Dear sirs:

Thanks for your visit to our company,i hope our administrative model and
product's quality level have impressed you.
In Shenzhen(此处替换成你公司所在城市),it is still hot these days,but it does not
prevent your comming here,we were touched deeply and appreciated for your efforts
and time.We believe that our joint efforts could lead to a fruitful
cooperation.and your visit would be a hopeful start.

In fact,since 2000,our company proceeded to extend business on European and
American market.our products gained glory by its quality and our prompt and
considerate service.so ,we hope we could serve you similarly to gain benefits for
both of us.

Action speaks louder than speak,we are looking forward to our in-deapth
cooperation,we believe that our establishing relation will be lead to a bright
and hopeful future.

again,thanks for your visit and efforts.if any question or further infor