Put an asterisk in the upper right corner of the names of the two correspondents, and then provide email addresses in the corresponding places.

Or it can be expressed in words in a prominent position in the article. This is not the focus of the audit, the focus will be on proofreading and typesetting in content and format. The academic design of young doctoral students is specially designed for periodical submission, which increases the publishing opportunities of international periodicals such as EI and SCI.