Which poison spring did the soldiers drink by mistake when Zhuge Liang went south?

Which poison spring did the soldiers drink by mistake when Zhuge Liang went south? Stupid spring.

Dumb spring is introduced as follows:

Dumb spring, a sweet spring, will be poisoned if you drink too much. Poisoned people will have hoarse voices and eventually die slowly.

During the Three Kingdoms period, Zhuge Liang led an army to capture Meng Huo, the southern king, by the Erhai Lake in Xi 'an, Yunnan, and met four poisonous springs, one of which was a dumb spring. When the weather is hot, men and women are poisoned by drinking dumb spring water, and the soldiers are speechless. Later, thanks to the guidance of a wise man, he drank the fountain of happiness again. "Spit evil saliva at once, and then he can speak."

The essence of dumb spring is introduced as follows:

Dumb water is a kind of spring water containing copper salt, that is, an aqueous solution of copper sulfate (bile alum), which is called bile water. There are too many copper salts in dumb springs, which are oxidized and decomposed by microorganisms such as thiobacillus thiooxidans, thiobacillus ferrooxidans and thiobacillus ferrooxidans in water.

Copper sulfate dissolved in water is initially formed. The water also contains some tiny crystals of gypsum, including too much magnesium sulfate, which leads to rapid dehydration of human vocal cords and esophagus, leading to short-term loss of voice. Drinking this bile will make people feel sick, vomit, diarrhea and slurred speech until they collapse and spasm and die.

Zhuge Liang introduced as follows:

Zhuge Liang (181-23410-8) Langya Yang Du (now yinan county, Linyi City, Shandong Province) was born in Wolong, the prime minister of Shu and Han in the Three Kingdoms period, and an outstanding politician, strategist, inventor and writer in ancient China.

Zhuge Liang went to Jingzhou with his uncle Zhuge Xuan in his early years. After Zhuge Xuan's death, Zhuge Liang lived in seclusion in Longzhong, and Liu Bei visited the thatched cottage when he was attached to Jingzhou Liu Biao. Zhuge Liang proposed to Liu Bei to occupy Jingzhou and Yizhou and unite Sun Quan against Cao Cao's Longzhong confrontation. According to Zhuge Liang's strategy, Liu Bei successfully occupied Jingzhou and Yizhou, and formed a tripartite confrontation with Sun Quan and Cao Cao.

In the first year of Zhangwu (22 1), Liu Bei proclaimed himself emperor and appointed Zhuge Liang as prime minister. After Liu Bei defeated Wu in the battle of Yiling, Liu Bei left Zhuge Liang in Yong 'an. After Liu Chan succeeded to the throne, Zhuge Liang was named the marquis of Wuxiang and was in charge of Yizhou animal husbandry.