Write a commentary on a historic site.

The burial pit of the Terracotta Warriors and Horses of Qin Shihuang (the Empress Xuan) is the largest underground military museum in the world. The layout of the terracotta warriors pit is reasonable and the structure is peculiar. At the bottom of the pit with a depth of about 5 meters, an east-west bearing wall is set up every 3 meters, and the terracotta warriors and horses are arranged in the holes between the walls. There are three terracotta warriors and horses pits in the Qin Mausoleum, which are arranged in a zigzag pattern. Qin Shihuang's No.1 pit is rectangular, with a length of 23 meters from east to west, a width of 62 meters from north to south and a depth of about 5 meters, with a total area of 14,26 square meters and sloping doorways on all sides. Most of the terracotta warriors are in the pit, with a height of about 1.85 meters, and the highest is nearly 2 meters. Taoma is about 1.5 meters high and 2 meters long, and the size of the chariot is the same as that of a practical car. People, carriages and military formations are artistic representations through realistic techniques. Most of the Qin terracotta warriors hold bronze weapons, including bows, crossbows, arrows, beryllium, spears, bows, swords, machetes and cymbals. Bronze weapons have been buried in the ground for more than 2, years, and they are still as bright and sharp as new. They were actual combat weapons at that time, wearing fine armor and knotted with colored threads on their chests. Military officials wear long crowns, and the number of contests will be more. The faces, fatness, expressions, eyebrows, eyes and ages of the terracotta warriors are different.

Qin Shihuang's No.2 figurine pit is in the shape of a curved ruler, which is located in the northeast of No.1 pit and the east of No.3 pit. It is 96 meters long from east to west and 84 meters wide from north to south, with a total area of about 6, square meters. The buildings in the pit are the same as those in the No.1 pit, but the arrangement is more complicated and the arms are more complete. It is the most spectacular military array among the three pits. It is a multi-armed special force composed of cavalry, chariots and infantry (including crossbowmen). Pit No.2 has an exhibition hall of 17, square meters, which is the largest and most complete modern site exhibition hall in China. There are more than 1,3 pottery figurines and horses, more than 8 chariots and tens of thousands of bronze weapons in the No.2 pit, among which general figurines, pommel horse figurines and kneeling shooting figurines are found for the first time. There are four sloping doorways at the east and west ends of No.2 pit, and two sloping doorways at the north. The figurine pit sits in the west and the main entrance is in the east. The layout in the pit is divided into four units. The first unit, located at the east end of the pit, is surrounded by 6 vertical crossbowmen figurines in the promenade, and the array center is composed of 16 squatting crossbowmen figurines in the east of Badao Road. Crossbowmen adopted the arrangement of stretching array in the array, and took turns shooting when standing and kneeling, in order to avoid the danger of slow tension. The second unit, located on the right side of the pit, consists of 64 chariots (the chariots are made of wood, leaving only relics). Each column is 8 times, and * * * has 8 columns. There are 4 terracotta horses the size of real horses in front of the car. At the back of each car, there are three soldiers and figures, the middle of which is the imperial hand Lamar, and the other two are standing on the left and right of the car respectively, holding long-handled weapons. The third unit, located in the middle, consists of 19 chariots, 264 infantry figurines and 8 knight figurines, which are divided into three columns. A knight figurine stands in front of each horse, holding the reins in one hand and pulling the bow in the other. In addition to three riders, there are 8~36 infantry figurines after each ride. The fourth unit, located on the left side of the army array, consisted of 18 knight figurines and 18 pottery pommel horse figurines arranged in 11 rows to form a rectangular cavalry array. Among them, the first and third columns are 6 chariots. Before each horse, stand a knight figurine in Hu suit, holding the horse with the right hand and the bow with the left hand. The 18 pieces of cavalry figurines in the pit are the image data of a large number of ancient cavalry discovered for the first time in the archaeological history of China. In terms of clothing and height, it strictly simulates the wartime image of ancient cavalry. Obviously different from infantry and chariots figurines. It wears a small round hat, which is fastened under the jaw with buckles on both sides, a jacket with tight sleeves, a collar and a right lapel, crotch pants, ankle boots, short and small armor, no shoulders and no hand armor. Clothes are short and light, and armor is simple and flexible. The special costume of cavalry figurines is also closely related to the tactical characteristics of cavalry.

the No.3 pit of Qin Shihuang is located on the north side of the western end of No.1 Terracotta Warriors and Horses Pit, opposite to No.2 Terracotta Warriors and Horses Pit from east to west, 25 meters from No.1 Pit in the south and 12 meters from No.2 Pit in the east, with an area of about 52 square meters. There is a chariot in front of the door, and there are 68 warriors and horses in it. Judging from the layout of the No.3 pit, it seems to be the general command, commanding the left, right and Chinese armed forces. Most of the terracotta figures in the No.3 pit have no heads, and the heads of the terracotta horses are also incomplete, and even some broken pottery pits have disappeared. It is not difficult to see that the No.3 terracotta pit has suffered serious man-made damage. Pit No.3 is of great significance to the study of ancient military history. In the wars before the Spring and Autumn Period and the Warring States Period, the commanding generals often had to take the lead and take the lead, so they often had to be ahead of the pawn. During the Spring and Autumn Period and the Warring States Period, with the increase of war scale and the change of combat mode, the commander's position began to move to the Chinese army. The Qin Dynasty War separated the headquarters from the Chinese army, which was a great progress in the development of military tactics. The headquarters came out independently to study and formulate a strict operational plan, and more importantly, the personal safety of the commanding generals was further guaranteed. This is an important symbol of the maturity of ancient military tactics. No.3 Qinkeng is the image data of the earliest military headquarters in the world archaeological history. Architectural structure, arrangement of pottery figurines, weapons and unearthed cultural relics all have certain characteristics. It provides valuable materials for studying the shape of ancient headquarters, the ceremony of divination and battle, the system of commanding generals, and the clothes and equipment to rely on.