On the southern edge of the historical center that graces Nanjing sits one of the most impressive defensive structures in the world. Zhonghua Gate, or the Gate of China, is a unique fortification complex and part of the ancient city wall system that China is so proud of. It is not just an entrance to the city, but a true labyrinth of stone and brick, covering an area of about 15,000 square meters.
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The architectural complexity of the gate is stunning: it was designed according to the ingenious principle of "catching a turtle in a jar." The structure consists of four rows of gates and three inner courtyards, which in the event of an attack would turn into a deadly trap for the enemy. Hidden within the massive walls are 27 secret rooms, capable of accommodating up to 3,000 soldiers at once, ready for a sudden counterattack.
\n\nThe materials used in construction deserve special attention. Every brick here holds a story: they are engraved with the names of the craftsmen and the counties responsible for the quality of production. They are held together by a special mortar based on rice gluten, which provided the building with incredible durability, allowing it to stand for over 600 years in nearly pristine condition.