Traditional Wushu is more troublesome. If you want to learn real talents, you should either learn from teachers (this is not enough, but also depends on whether the master recognizes you as a successor, some teachers are more open-minded and some are more conservative) or study abroad (which requires you to be talented, eager to learn, have plenty of time and have good economic conditions). Go to some places where traditional martial arts gather, learn more and see more. If you can't do both, it's basically a show, and it's easy to get hurt.
Sanda, judo and boxing are very studious and practical, and they can also exercise. If you follow the steps, it will be safer, and there is not much special training on arrest. Some martial arts martial arts schools may have special grasping training, and traditional jujitsu has joint skills. I don't know if judo teachers will teach these things now, but in any case, grasping is the use of comprehensive ability. If you can't meet your own conditions, you can't do it if you only know the technology.
No one can say for sure where is the best. If you want to learn, you will inevitably take detours, so that you can have experience.
Introduce some places where there are many martial arts practitioners in China as far as I know (there are still many):
Shanxi Taigu: Xingyiquan in Song Dynasty.
Chenjiagou, Henan: Biography of Chen Taiji.
Zhaobao Town, Henan Province: Zhao Bao Taiji Biography
Henan, Shaolin Temple: Various.
Wudang Mountain in Hubei Province: There are many kinds.
Hebei and Cangzhou: There are many kinds.
Yongnian, Hebei: Jichuan, Yang Tai and Wutai Jichuan.
In addition, there are many famous artists in Beijing, but Beijing is not a place where martial arts practitioners gather, and it is not so easy to find these famous artists to study.