It is said that in the Opium War, a battle rained, and the British gunpowder was all wet, so the firearms could not be used. The Qing army won a total victory, but the Qing army did not pursue it.

This statement is not accurate. The Opium War was a war between China and Britain, one of which was the Battle of Humen in 184 1. In this battle, the British army dispatched a large number of warships and troops to try to capture the Humen fortress and control the Pearl River Basin. The Qing army took loyal opposition, and finally successfully repelled the British army.

Although the battle did rain, it did not lead to all the British gunpowder getting wet and the firearms being unusable. In fact, the British army used a lot of firearms, including naval guns and rifles, which caused serious losses to the Qing army.

Historians have different views on whether the Qing army should pursue victory. Some people think that if the Qing army can make full use of its own advantages and pursue victory, it may achieve greater victory. However, some people think that the pursuit may lead to more losses, because the equipment and tactics of the Qing army are behind those of the British army.

In a word, although some weather factors did appear in this battle, they were not the reason why the Qing army won. Historians have different views on whether the Qing army should pursue victory.