As for ligaments, Taekwondo does not require you to open more horizontal forks than vertical forks. Of course, it is best to open it. Ligament stretching has little to do with age. The key is to pull it often, at one o'clock every day, and it will open unconsciously. There is no need to spend three years practicing ligaments. If you are serious, two months is enough. The key is to loosen it every day after opening it.
In actual combat, first, it depends on your coach, but it depends on your personal qualifications, especially the latter is very important. If you have good qualifications, you can get 1V3 in one year, but if you don't practice well, you will be a loser all your life. In addition, WTF Taekwondo, which is popular internationally, mainly focuses on the application of leg technique. If you want to practice in actual combat, you should also pay attention to the upper limb ability.
The feeling of going to Korea for training is of little value. On the one hand, it is difficult to understand the nature of technology because of the language barrier. On the other hand, although the Taoist temples in China are mixed, in terms of the highest quality, the Taoist temples in China are by no means worse than those in South Korea, and the communication is smooth, which is convenient for you to understand various technologies faster.
Limited ability, hope to adopt.