This description is very hard. 禹 Yǔ, Yu the Great is a legendary ancient ruler who controlled great floods for the first time(?). 李淳风 Lǐ Chúnfēng is a prominent early Tang dynasty mathematician. 周髀算经 Zhōubì Suànjīng is one of China’s earliest mathematical treaties.
The idea of accumulated carpenter’s square probably has something to do with calculating area and geometry? In any case, in our sword mastery context, it represents absolute precision, discipline and structure and values impeccable technique. The moves do look very neat and precise!
The anecdote on the Taichi skill is quite funny!
熊侠!