回复：回复：急问！！妈妈签证遇到麻烦，烦请大家帮忙！！！！！！

yes, it depends on the vo
but we did not apply the visa extension before, why they gave us this information.
I was really confused, and the notice said we need to prepare the required material, but we did not apply for it, how can we provide any extension material

should I fax a appeal letter to the beijing embassy?

Thanks a lot