The child asked me why Japanese devils robbed the bronze bells of Japanese temples in War of Resistance against Japanese Aggression. How to explain it clearly?

Metals are also strategic resources, because the Japanese invasion of China consumed a lot of strategic resources, such as airplanes, cannons, bullets, artillery shells, bacterial bombs and so on. These are all inseparable from metals, resulting in a shortage of metals. They also shipped the metals, iron, copper, tin, steel, silver and gold plundered from China back to Japan to make weapons and slaughter the people of China.