Of course. Pay attention to the time of applying for extension. Do not apply before the deadline. You can apply for extension of sci paper repair 2~3 days in advance. When the author finds that it takes more time to complete the revision of sci than the specified revision period, he should write an email to the journal editor in advance, explaining the reasons why it cannot be revised in time. Only when the author communicates patiently with the editor and the reason for the delay is sufficient and reasonable, the editor will understand and give a reply allowing the modification to be delayed.