During the Warring States period, in order to strengthen themselves, various vassal States successively carried out reforms. In the political reform, Shang Yang's political reform of Qin was the most significant, while in the military reform, Zhao Haoqi Wuling's Khufu riding and shooting was the most important. King Wuling of Zhao's literary martial arts is not outstanding, but he learned from the ethnic minorities outside the Great Wall and carried out a substantial reform of the traditional military uniform, thus leaving a far-reaching impact in history. King Wuling of Zhao's riding and shooting of Khufu changed the military combat mode of all countries in the Central Plains. Since then, the combat mode of chariots has withdrawn from the historical stage and been replaced by cavalry. From then on, Zhao's famous soldiers came forth in large numbers, becoming the only big country among the six eastern countries that could compete with Qin until the battle of Changping.
The Record Spirit of Historical Records
First of all, it is manifested in the extensive collection and detailed possession of materials and the textual research and selection of historical materials. In order to write historical records, Sima Qian traveled around, made friends with Yan and Hao Jun, and traveled all over the world. He traveled to the coast in the east, Gansu in the west, Xiaoshuitou in Xiangjiang River in the south, Hetao in Inner Mongolia in the north, the capital of Jiangsu, Zhejiang and wuyue in the southeast, and Yunnan-Guizhou Plateau in the southwest, covering the whole territory of the Han Dynasty and all the surrounding areas that the author could understand, and collected a lot of first-hand materials in many ways. In addition to on-the-spot investigation and evaluation, he also consulted a large number of ancient and modern books, especially pre-Qin ancient books. All the books before the Han Dynasty were adopted without exception, which also constituted another source of materials for Historical Records: "The Six Classics of Invincible Evil and Different Biographies, and all kinds of miscellaneous languages were neat". Hanshu? "Biography of Sima Qian" also said: "Sima Qian adopted the Warring States policy according to the concerns of the left and the country, describing the Spring and Autumn Period of Chu and Han Dynasties, and then ending in Tianhan." However, due to the war, the scattered literature at that time was very serious. "Preface to Taishi Gong" said: "Zhou Dao was abolished, Qin pulled out ancient prose, and burned poetry books, so the stone room was scattered." Historical records? The Chronicle of the Six Kingdoms also records in this respect: "Qin was proud and burned poetry books all over the world, especially the historical records of governors, and was laughed at for this." Therefore, it is a pity to see that there are many Tibetan poets and calligraphers, while the historical records hide the Zhou room alone. What a pity! The unique "Ji Qin" does not contain the sun and the moon, and the words are slightly lacking. "These all give Sima Qian a test of historical materials.