孩子還在加拿大上學， 六月底才能回國，不能請假一起去麵試。請問申請改期麵試是去網站還是打電話？ 可否給個網站鏈接，或電話號碼。廣州領事館網站搜索不到相關信息。十分感謝！
Read the following at this link:
U.S. Consulate General Guangzhou, China - GUZ (state.gov)
Rescheduling or cancelling your interview
If you are unable to attend your appointment, please email us as soon as possible using our online inquiry form. There may be a significant wait before the next available appointment, so please attempt to attend the date already assigned. For some family-based and employment preference visa categories, a visa could become available within the month you have been scheduled by NVC. There is no guarantee that a visa will still be available on the date of your rescheduled interview. Please carefully consult the Visa Bulletin before you decide to reschedule you interview.
