We want to speed up business relationship.

我们想加快业务关系的发展。

Welcome to establish business relationship with us, we guarantee to cooperate.

欢迎你们和我们建立业务关系，我们保证给予合作。

We would like to have a reliable business relationship with you for our mutual benefit.

我们希望有一个可靠的业务关系，与您为我们的互惠互利…

We learnt from …that your are interested and well experienced in …business, and would like to establish business relationship with us.

我方从…（某公司、或朋友）获悉，你方对… 业务感兴趣且颇有经验，意欲与我方建立业务关系。

We hope to establish a long - term business relationship with you.

我们希望能建立一个长期的业务关系，与你。