What is the origin of shortbread?

The origin of The Scholars, a famous novel in Qing Dynasty, has been mentioned and praised. Shortcakes are made of refined white flour mixed with white sugar and fried with peanuts. Wu Shan shortbread has a long history. About 1000 years ago (at the end of the Five Dynasties and Ten Kingdoms), when Zhao Kuangyin and Liu Renshan of the Southern Tang Dynasty were fighting in Shouxian County, Anhui Province, the local people used chestnut powder to make shortcakes to support Zhao Jun. Later, Zhao Kuangyin became emperor and often ordered chefs to make such cakes. When Emperor Gaozong moved his capital to Lin 'an (now Hangzhou), he often ate this kind of cake, which was later spread to the people by chefs. People make Wu Shan shortbread with flour in Wu Shan scenic spots, which is known as the first point in Wu Shan and has been passed down to this day. Traditional scenic spots in Hangzhou. It was named after the praise of Su Dongpo, the governor of Hangzhou, for the frequent contributions of Wu Shan scenic spots in the old days. There are two legends about the origin of Wu Shan shortbread. One theory originated from the famous "Great Rescue" published in the early Song Dynasty. After the Southern Song Dynasty, he moved the capital to Hangzhou. The world imitated Catastrophe as an excuse, hoping that the Southern Song Dynasty court would remember the difficulty of founding the country and not humiliate the country. This is the most famous one produced in Wushan, so it has the reputation of "Wu Shan Shortbread". The second theory is named after Su Dongpo in the Northern Song Dynasty. At that time, Su Dongpo was appointed as the magistrate of Hangzhou. One day, he was traveling in Wushan in the rain, wearing hemp fiber and sandals. When he saw everyone vying for oil cakes, he also bought a few, untied the wine gourd and sat in the wild flowers and tasted it. I think this cake is crisp and delicious. What's the name of the shop? The shopkeeper replied, "Shan Ye snacks don't have a good name". Su Dongpo looked at the cake carefully, layer by layer, a little bit like hemp fiber on his body, and casually said, "Well, since there is no nickname, let's call it hemp fiber cake!" Since Su Dongpo named this kind of cake, Wu Shan's "hemp fiber cake" has been prosperous and famous. Because "hemp fiber cake" and "shortbread" complement each other, and the cake itself is oily and brittle, it was later renamed "shortbread". The shortcake system evolved from chestnut cakes in Shouxian County, Anhui Province. It is made of pastry with oil surface. Golden color, crisp at one time, round at the top, golden hill-shaped, wrapped in fine sugar, crisp but not broken, oily but not greasy, sweet and delicious, and crisp at the entrance. Wu Shan initiated this system in the Southern Song Dynasty.