The ancient armor of China was not light. In Song Dynasty, chain mail in Europe weighed only 15 kg, and the full-length armor of Goth in 15 century was only 20 kg. Although the heaviest armor in the17th century reached 42kg, the ordinary armor with a weight of three quarters was only in the range of 20-30kg. In terms of weight, the infantry armor of Song Dynasty in China was the heaviest armor in the history of China. According to the records in the General Theory of Martial Arts, the infantry armor in the Northern Song Dynasty is a typical armor, which is composed of armor leaves plus pimps or nails. Its protection scope includes the whole body. In terms of protection scope, it is the closest China armor to European heavy armor, but it has not reached the impenetrable protection level of European heavy armor.

According to the regulation of Shaoxing in the 4th year of Song Dynasty (1 134), Bulinjia is composed of 1825 pieces of nail leaves, with a total weight of 29 kg. At the same time, increasing the number of nail leaves can improve the protection force, but the weight will further increase. To this end, the emperor personally ordered that the infantry armor should not exceed 29.8 kilograms. Since then, the armor weight of long gunners has been set at 32-35 kilograms; Because archers often participate in melee combat, their armor is set at 28-33 kg; The crossbow shooter's armor is set at 22-27 kg. At the same time, the armor type of European cavalry is mainly chain mail, which has not reached such a weight.

Shaoxing ten years ago was the most prosperous period of Song Jun. Famous soldiers Yue Fei and Han Shizhong. , led by real armor, pike, strong crossbow as the main equipment of heavy infantry, with a dense lineup to defeat the Jurchen cavalry many times. At that time, Song Jun's heavy infantry, including weapons, carried as much as 40-50 kilograms, and their mobility was affected by heavy equipment. For example, in the 11th year of Shaoxing (11), Song Jun, which was dominated by infantry, was overloaded because of its heavy armor and long weapons.