The period from Grade C to Grade B is about 1 w5 2 months.
B to A is probably more than 2W, depending on your skills!
PS: Pet beauticians can't just pay attention to certificates, what matters is craftsmanship. Class C is elementary, teaching you the most basic pet dog care and styling. It's relatively easy for you to practice scissors more.
Class B is to teach you deep dog modeling and medical treatment.
If you are an a-level, you will mainly play games.
I don't know Guangzhou. I study in Shanghai, so I shouldn't be able to come here.
It's best to go on a field trip instead of watching online bravado.