Krupp cannon, caliber 280 mm. The barrel is 11.2 meters long, weighs 44 tons, has an elevation angle of up to 30 degrees, an effective range of 19,760 meters, and a shell that can penetrate 65 meters within 3,000 meters.

Krupp cannon, caliber 280 mm. The barrel is 11.2 meters long, weighs 44 tons, has an elevation angle of up to 30 degrees, an effective range of 19,760 meters, and the shell can penetrate 65.8mm steel plates within 3,000 meters, firing 1-2 shells per minute.

The fact that the Qing Dynasty was able to spend so much money on German artillery shows that it still attaches great importance to national defense.

Originally, it was two doors, and the other was used as scrap iron when smelting iron, and the remaining one became unique in the world, and its significance was even more profound