Tell me about the age when a man first wears leather shoes

16. The world’s first pair of leather shoes was born in China. During the Warring States Period in our country, the famous military strategist Sun Bin studied the art of war with Pang Juan when he was young. Later, Pang Juan became a general in Wei State. He knew that his talents were not as good as Sun Bin, so he plotted to harm him. One day, he invited Sun Bin to the capital of Wei (today's Kaifeng, Henan Province), and on an excuse, he executed Sun Bin by mutilation (removing the paint covering his bones), causing him to become disabled and put him under house arrest. Later, Sun Bin received help from Qi's envoys and secretly returned to Qi. He also recommended Qi general Tian Ji to King Wei of Qi. King Wei asked about the art of war, and Sun Bin answered fluently, so he appointed him as military advisor. Sun Bin personally commanded and trained 100,000 elite troops in order to avenge Pang Juan for having his foot broken. But because his feet couldn't walk and couldn't be supported, he used the original leather shoes as a basis and designed a pattern of two parts: the greaves (upper) and the sole, carved a wooden last, and the shoemaker used harder leather and sewed it according to the pattern. A pair of "Gao Yongzi shoes" were made. This pair of high-waisted leather boots is divided into two parts: upper and sole. It is the prototype of modern leather shoes and can be regarded as the ancestor of leather shoes in the world.