Hands and feet defend accordingly, there are no secret unstoppable maneuvers
Sao gerk seung siu, mo jit jiu
One of the maxim of the Wing Chun and the ideal Ip Man strove towards during his entire martial arts life. "Sao gerk seung siu, mo jit jiu", translated as "Hands and feet defend accordingly, there are no secret unstoppable maneuvers" is one of the main principles of the Ip Man Style of Wing Chun, that hold itself as a non-nonsense practical system that rewards hardwork over secret techniques. The saying has contains two obvious meanings. The first one is the one given to novices of the system to quickly lower expectations:No with Wing Chun you will not learn secret techiniques like breaking the reality with swords or becoming invisible by fusing with nature. Differing from most Traditional Kung Fu styles, Wing Chun only has 6 Forms(Three for Barehanded fighting, 1 for Wooden Dummies, and 2 for weapons:Long Pole and the Butterfly Knives) which compared to lets say Bajiquan that has 20 forms just for barehanded fighting, is a pretty low number. But while these Wing Chun has less forms, the system is a expensive and practical one that rewards mastering the basics. By reducing the forms into just 6 forms, the student is quickly able to grasp the basic elements which allows to quickly begin sparring. This simplicity made Ip Man's teachings to be quickly grasped by the most varied group of people: from adults to kids and even old people, Wing Chun quickly became China's main form of Self Defense. But this surface simplicity hides a hidden depth. While Wing Chun lacks the number of forms, they're all emcompassing and all-evolving, while Chi Sau and constant sparring made Wing Chun one of the most versatile styles, capable of answering any technique from the enemy. This ties to the final and most arrogant of meaning of the maxim, symbolizing Wing Chun's perfect system of defense and counter-attack. By using their high sensitivity, knowledge, and understanding of the system the masters of this style are able to stop even the most powerful of techniques. Wing Chun laughs at trump cards, rewarding the understanding of basics.
Thanks to Shielder absoute mastery of this principle, this skill, ironically, has become Ip Man's trump card transforming into something close to a Noble Phantasm like a certain nameles samurai Reality Breaking Sword and a fellow Kung Fu Master Instant Kill Punch. But while those are offensive skills, Ip Man's an almost exclusively defensive one, that is expecialized in hunting down and breaking down the enemies secret techniques. When locked in Combat, Ip Man is able to create, purely through martial skill, something close to a bounding field. Inside that Bounded Field, Shielder is able to manipulate causality: Inside of it, it doesn't matter what blow the opponent throw, there but one rule "Shielder will defend and stop the opponent's attack". While on the the basic level this merely translates as Shielder being able to match any strike, this can quickly reaches ridiculous levels when Shielder suddenly starts to break reality alongside a certain Samurai sword.
While not an offensive skill this is an incredibly powerful one. It translates in Close Combat Domination. At the very worse, if the opponent is able to surpass Ip Man and he isn't able to finish him, the kung fu master is able to stall the close-quarters fight into virtually infinity. Ip Man essentially transforms his entire body into a shield that is able to lock any opponent as long as he tries to play by his rules.
Of course there are weakness to this technique. Most obviously, the bounded field is the size of Ip Man's combat range, so attacks thrown at him from outside of that range, can bypass most of the effect. Secondly, no matter how powerful his technique is, Ip Man technique works against other techniques, so while he is able to stop the blow from a certain female king magic sword, he isn't able to stop this magic sword beam. Lastly, this skill works against enemies throwing blows on him. While Shielder can use this technique to Shield someone from an attack, it's not a perfect defense and it might result in either Shielder or said someone taking heavy damage.
Anti-Unit Demonic Fist