Although Sun Hui gave the Song Dynasty a firearms unit equipped with advanced combat concepts, he did not abolish the use of cold weapons such as knives, spears, bows and arrows in specific operations, but instead strengthened the role of cold weapons in close combat, not because he himself was backward in thinking and liked cold weapons, but based on real historical lessons.

The lesson comes from the Qing Dynasty hundreds of years later in the original historical time and space.

Influenced by the mainstream view of history, many people believe that the Qing Dynasty did not attach importance to the development of firearms, and began to focus on firearms in the late Kangxi era, so that the Qing army has always been dominated by cold weapons, and firearms were gradually abandoned, and the level of firearms in the Qing Dynasty was not as good as that of the Ming Dynasty during the Opium War, and they did not know what firearms were, so the Qing army armed with swords and spears was defeated in front of the firearms of foreign devils, which led to the defeat of the war, that is to say, the failure of the Qing army was due to the Qing Dynasty's conservative stubbornness in the development of firearms. Even fearing that the development of firearms technology would threaten the Manchurian advantage of archers and horses, they deliberately stifled the development of firearms and only attached importance to hand-to-hand combat with bows and horses, which caused China's firearms technology to decline significantly, thus lagging far behind the West, and eventually led to the defeat of the Opium War and plunged China into a dark age at the end of the Qing Dynasty. In a word, because of the heavy cavalry and light firearms of the Manchurians, China's firearms technology lagged behind that of the West by a large margin.

However, the fact is just the opposite, the Manchurian talent attaches the most importance to firearms, as for the arch and horse riding and shooting, the knife and spear hand-to-hand combat is the fastest project of the Manchurian desertion, the Qing army to the bow and horse riding and shooting, the speed of the abolition of the knife and spear hand-to-hand combat training has reached an unprecedented speed, looking at the world can not find a second one, it can be said that the Qing army in the Opium War period and even after the Opium War, has always been the country with the most serious firearms combat ideas in the world, almost completely abolished hand-to-hand combat, there is no hand-to-hand combat ability at all, and the war relies on firearms shooting. If the Qing army really built the country on bow and horse, and mainly mounted and archery, then the Opium War would not have failed.

As early as the post-Jin era, the Qing army showed a strong interest in the development and use of firearms, and the interest in firearm technology and the acceptance of use was surprisingly high, far surpassing that of the Ming Dynasty. It took 20 years for the Ming Dynasty to accept the "Hongyi cannon", and the attitude of the Qing army towards firearms was completely opposite, not only the mastery of firearms was extremely fast, but also the technical improvement was extremely fast, in 1630 (Tiancong four years) accidentally obtained 1 Hongyi cannon, in 1631 (Tiancong five years) produced an improved steel cast Hongyi cannon "Tianyou Cheering General", in 1643 (Chongde eight years) more produced the composite cannon body of the Hongyi cannon "Shenwei General". After the Qing army entered the customs, because it had the most powerful artillery at that time, it was like child's play to storm the city and sweep the Nanming, and the combination of the world's strongest firearms and the strongest hand-to-hand combat force can be said to be unstoppable. At the beginning of the Qing Dynasty, after the Qing army entered the customs, the Qing army destroyed the Southern Ming Dynasty and collected Xinjiang during the Shunzhi period, so the artillery technology continued to develop, and the number of artillery equipment of the Qing army increased during this period. At the beginning of the Kangxi period, it was peaceful for a period of time, and the artillery manufacturing and production speed of the Qing Dynasty slowed down, but with the rebellion of the three feudatories, the war resumed, and the number of artillery production increased again.

Since Kangxi, the situation has been relatively stable, the Qing army has not fought for a long time, neglected training, and is greedy for pleasure, so it is unwilling to practice the toiling archery of archery and horse-to-horse, hand-to-hand combat with swords and guns. So they all hope to equip training firearms, at that time, firecracker training was much simpler than archery, loaded with gunpowder and a crisp sound to hit an iron pellet out, easy and fun, it can be completed by a person, and archery is really tiring to death, without hundreds of pounds of strength can not pull a hard bow at all (an important reason for the abolition of the longbow and the use of muskets in British history is that bow and arrow training is too tiring and time-consuming), knife and spear training to kill and kill is definitely hard work. Therefore, from this time, the Qing army was equipped with higher and higher firearms, and the hand-to-hand combat of archers, horses, horses, swords, and spears was gradually abandoned, and it transitioned to the era of mainly using firearms, and a large number of shotguns and light artillery replaced bows, arrows, knives and spears.

In the Yongzheng period, Emperor Yongzheng clearly saw that the Eight Banners Army at that time was becoming more and more firearms, but the performance of firearms was absolutely not to the point where the battle did not need hand-to-hand combat at all, so he had the instructions of "shooting with Manchurian heavy cavalry, not specializing in bird guns and abandoning bows and arrows, and those who are familiar with guns and arrows on horses, reluctantly superior", re-emphasizing the role of swords, spears, bows and arrows. However, Emperor Yongzheng's instructions on not specializing in shotguns and abandoning bows and arrows were not followed at all, and the Eight Banners stationed in various places evolved into shotgun teams and small artillery teams. After the Qianlong period, the Qing army not only the Eight Banners Army, but also the Green Battalion soldiers began to be fully firearmed. By the Jiaqing period, the Qing army was basically close to completely losing the ability to fight hand-to-hand, and many jokes were made during the exercise. However, the entire Jiaqing period was generally peaceful, so the Qing army's hand-to-hand combat ability declined to the point of extreme weakness, and it did not cause much serious consequences. By the time the Opium War broke out in 1840, the Qing army actually had more than 70% of the firearms and equipment, and there were not many cold weapons at all, and almost no troops had been trained in hand-to-hand combat. By this time, the Qing army had completely lost what had been its strongest specialty, hand-to-hand combat.

It is unbelievable that the British defeated the Qing army in the Opium War not by advanced firearms, but by primitive hand-to-hand combat. During the battle, the British army found that the Qing sergeant could still endure the flowering shells from the British ships behind the fort, and had the courage to hold his position and fight back without escaping. But often as soon as the British army launched a decisive white-knuckle charge, the Qing army immediately collapsed.

Under the technical conditions at that time, neither the British army nor the Qing army could not completely rely on firearms to prevent the opponent's hand-to-hand combat impact, because the musket was not accurate at that time, the firing speed was not fast, and when the enemy infantry rushed to the front, it was actually impossible to kill a few people, so the European armies at that time all practiced hand-to-hand combat, and the phalanx infantry bayonet charge was the final means of victory. The Qing army, on the other hand, completely abandoned hand-to-hand combat because of the strong concept of firearms warfare, and when they saw the British soldiers rushing in with bayonets and foreign guns, the Qing army was all scattered, and immediately dropped their cannons and fled for their lives. In the Opium War, a series of Qing fortress forts captured by the British army were basically captured by white-knuckle warfare.