Are Sanda and Taekwondo the boxing methods in China?

Not exactly. Taekwondo originated from Korean folk Wushu 1500 years ago. It combines Korean Hualang Dao, China Wushu and Japanese Karate. Taekwondo developed in 688 AD when Silla Kingdom unified Korea. Sanda is a traditional martial art in China, but now Sanda is completely different from it, and it has become a real fighting type, which is closer to free fighting. Most of these people learn because they can exercise people well, and they have quick results, low requirements and easy to use.