There is no difference between adult classes and youth classes, but the teaching time is different.
According to the previous charging standard:
20 times /400 yuan RMB
40 times /800 RMB (now the coach says it's 750 RMB)
Year card/1800 yuan RMB
There are only three forms.
If you are really interested in Taekwondo, I suggest you go to Han Feng Taekwondo Hall. Before, the coaches there were all long-term coaches. Although Han Feng has just started, many students there have already made great achievements.
In addition, if you are visiting for the first time, you need to buy uniforms and shoes printed with the words "Jiujiulong". The fees for uniforms and shoes are 150 RMB and 120 RMB respectively, which are basically the same in all exhibition halls. You can't guarantee all the pavilions, but you can be sure that the Jiujiulong and Hanfeng pavilions are at this price.
I hope my answer can bring you some help, because we all love TKD.