1.催稿信：
Dear Editor，
We submitted a manuscript entitled “****＊＊*" （Ref. No。:editor decision＊***) to Journal of **＊* six months ago. However， we have not yet received your decision on our manuscript。 The status of my manuscript was “Required Reviews Completed” since Jan 07， 2015。 This state has lasted more than two months。 Could you please do me a favor to check the reviewing process of our manuscript？
Thank you very much for your time and consideration. I am looking forward to hearing from you。
With kind regards,
Yours sincerely,
2.撤稿信
Dear editor: 
Please excuse me for taking some of your time. We submitted a manuscript entitled " ＊＊*" to your journal。 But now we feel that we have not yet studied our work completely and some new great results are discovered。 So after carefully thinking, we are going to rearrange this manuscript and try to give more precise model. Thus we decided to withdraw this manuscript with great pity。 Of course, after re—preparation， in your journal you will find this lovely manuscript， and we hope it comes soon. We sincerely say sorry for all the staffs involved this manuscript, including editor， reviewers， etc。 because of our action.
Thank you very much for your time and kind consideration.
Best regards
Yours sincerely,
*＊*