6周时间，可以跟编辑委婉的写封邮件询问稿件状态。

Dear Prof. ×××:

Sorry for disturbing you. I am not sure if it is the right time to contact you to inquire about the status of my submitted manuscript titled “Paper Title”. (ID: 文章稿号), although the status of “under review” has been lasting for 5 weeks, since submitted to journal 6 weeks ago. 

I would be greatly appreciated if you could spend some of your time check the status for us. I am very pleased to hear from you on the reviewer’s comments.

Thank you very much for your consideration.

Best regards!

Yours sincerely,

××××××

Corresponding author:

Name: ×××

E-mail: ××××@××××