Can the peak Qin State (Korea) beat the Southern Song Dynasty? What if it crosses (considering the poor technology)?

In my opinion, both the Qin Dynasty and the Southern Song Dynasty belong to the era of cold weapons. Although the firearm "musket" was invented in the Southern Song Dynasty, it does not mean that the Southern Song Dynasty can use large-scale weapons to suppress the Qin Dynasty. First, the science and technology in the Southern Song Dynasty was not as developed as expected; Secondly, the most criticized thing in the Southern Song Dynasty was its chaotic political system. So despite Yue Fei's help, I don't think the Southern Song Dynasty can beat the Qin Dynasty.

A brief evaluation of the Southern Song Dynasty and the Qin Dynasty Many people say that the existence of the Southern Song Dynasty imperial court is a joke in history. Although its development in science, technology and culture is remarkable, it still can't change its political corruption and treacherous court official's situation. Although there were military forces such as Yue Jiajun and Han Jiajun in the late Southern Song Dynasty, their partial security policy directly led to the collapse of the army and the loss of popular support. In the end, Mobei nationality dealt a cruel blow to the Southern Song Dynasty.

Looking back at Qin Shihuang, there are many voices to rehabilitate Qin Shihuang. I don't think it is necessary, because judging a person depends on his merits and demerits. However, it is undeniable that due to its excellent legal system, during the reign of Qin Shihuang, the world was consolidated to a certain extent, which really formed a unified situation and created a new situation.

The gap in strength First of all, there are definitely more talents in the Qin Dynasty than in the Southern Song Dynasty. It is not that there were no outstanding figures in the Southern Song Dynasty, but that these talents in the Southern Song Dynasty could not be reused by the court. The emperor was not blinded by treacherous court officials, but had his own problems. The Southern Song Dynasty evolved from the Northern Song Dynasty, which raises a question. At the beginning of its establishment, Zhao Kuangyin released soldiers with a glass of wine, which meant that the power of military commanders would be weakened forever.

In the Southern Song Dynasty, this situation was even more serious. Even if the defeated troops in the Southern Song Dynasty wanted to build their own military strength, the emperor and some ministers were not allowed to do so, because they thought that the military commanders would take power and might form a private armed rebellion against the imperial court. Yue Fei's death is actually for this reason.

The Qin dynasty unified the six countries and established a complete dynasty, whose economic and military strength was unmatched by later dynasties. Imagine a dynasty that has experienced many wars or a dynasty that suppressed its own soldiers. Which one will win?

Qin has a vast territory and abundant talents. On the other hand, the Southern Song Dynasty was oppressed by many forces or invaded by foreign countries, which made it impossible to form a peaceful and stable situation. Emperors can enjoy themselves, of course, but they don't want to think, without their own support, how many military commanders will be killed by treacherous court officials in the DPRK, and who will depend on their own soldiers?

Of course, we don't consider losing the hearts of two imperial courts. After all, to varying degrees, these two imperial courts have been criticized by people all over the world. Only by looking at the comparison of military strength, it is impossible for the Southern Song Dynasty to defeat the Qin Dynasty. It's not that Yue Fei can't beat Leitian, but that the court doesn't support Yue Fei, but Qin Shihuang definitely supports Leitian.

To sum up, although fighting is a comparison of comprehensive strength, it can't be compared only by a single aspect, but judging from the trend of the whole Southern Song Dynasty, its later thought of betraying the country and seeking glory determines that it will undoubtedly be defeated.