hello, my dear friend. Thanks for your last letter. I am so glad you still remember us, your Chinese old friends.(如果是非正式信函,就不用那么多废话,外国人不喜欢太多寒暄)I am planning to set up a platform, (不知道你的平台是什么意思,如果是网站,此处可换成 Website,如果是社团,可以说是group 或者 community, 如果是乐队,可以说band 等等) then we can unite and link with each other at that time. I appreciate your platform with the desiring of noble music. I hope we can make progress and create a bright future together.your forever friend (其实建议写yours,什么永远啊,老朋友啊,中国采用,一句yours,简单又通俗)xxxxxxWish god bless you forever, and long live our friendship. (这句应该在yours之前)所以全文就是:hello, my dear friend. Thanks for your last letter. I am so glad you still remember us, your Chinese old friendsI am planning to set up a website,then we can unite and link with each other at that time. I appreciate your platform with the desiring of noble music. I hope we can make progress and create a bright future together.Wish god bless you forever, and long live our friendship.yoursxxx