Src American immigrants

I suggest you ask your mother to call NVC as soon as possible. Because at every step, the American visa center will send a letter to American applicants to inform them to collect their documents. What do they need next? When they get all the necessary documents, they will send a letter to the applicant, saying that they will mail all the information to the Guangzhou Consulate. The key is whether your mother has this letter from America. This is what you need to ask now.