When can American relatives immigrants receive the interview notice from Guangzhou?

In this case, it is very unlikely that you will be refused a visa. Do as your mother says. Because he will ask you some questions.

Because you are underage, your work and rest are faster than others. You will be informed within six months from the day you receive the materials from the consulate. Go to the interview according to the time in the letter. After the interview, I will give you an answer within 1~2 months. If I succeed or fail, I will inform you by phone or letter. Then you go to Guangzhou to go through the formalities according to the time of the letter. Then you can buy air tickets and fly at any time.

PS: Vaccination is very important. The letter will tell you what to take. Hepatitis A, hepatitis B and so on.