建议信模板1：

Dear _________,

I am very glad to hear that you want to seek some suggestions about _________ in order to _________.

From my point of view, _________. Also, to you, I highly recommend that _________. On the one hand, _________. On the other hand, _________. Besides, it is unnecessary for you to _________. Consequently, I believe that _________.

I hope that my opinions are of help to you, and please feel free to contact me for more questions.

Yours sincerely,
Li Ming

建议信模板2：

Dear _________,

I am writing to express my views concerning ________. In the first place, I would like to say thank you for the help and everything else you have been offering to us. Meanwhile, I also want to make some advice to better _________.

Firstly, we have found that ________. Secondly, we want to ________. Finally, we hope that __________.

I am looking forwards to your consideration about my proposals. Thanks in advance for that.

Yours sincerely,
Li Ming