Li Shuwen is all around ridiculous. He is modern day Heroic Spirit (who didn't sell his soul to Alaya unlike someone we all know) with crazy skill level... Martial Arts (A+++)... Or outright crazy skill like Sphere Boundary.
Add here is that Nasuverse Martial Arts are not simple kicking some asses without weapon. It's actualy an immitation of magecraft natural to divine spirits.
Breathing and Walking (Õæ╝ÕÉ©Òâ╗µ¡®µ│ò,
Kokyü Hohō?) is a key concept in Magecraft and Martial Arts. Though mainly affects one's physical fitness, it also plays a role in the strength of nature interference. The absorption of outer energy (breath of life) to connect your inner world to the outer world. The acts of inspiring, expiring and everything in between are part of a process that allows one to take in or release the gods. The Magi use incanted spells to cause a specific phenomenon to occur, but those whose breathing, movement, body and very existence can cause nature interference are beyond that. An example would be the
Shinto practice of banishing evil spirits and other unnatural forces by just clapping. However, this particular skill is something that takes a lifetime to learn. Not valued by Western magi, but among the teachings of the east, the techniques of breathing and walking are high-level secrets that can't just be imitated or easily learned. Therefore, Eastern schools always search for at least one individual capable of mastering them in a generation.
Sometimes however, there are those who are simply born with the "proper way of breathing and walking". As a result, their own body acts as one pure, natural Circuit. Those humans can reproduce greater mysteries than the magi without knowing anything about Thaumaturgy. When found while still on their childhood, they are treated as holy children or prodigies and usually take in by those who follow the supernatural path. Still, there are cases of those who grow up without learning about their true nature.