would you please help to double confirm those participants from China of the APAC conference

would you please help to double confirm those participants from China of the APAC conference
In the attached file,would you please help to double confirm those participants from China of the APAC conference and get the original air tickets from them for our payment arrangement?Many thanks.
这是关于差旅报销的一封邮件，春节前我公司员工到新加坡参加总部的会议，现在总部要给报销差旅费，