The green bamboo snake's mouth, the needle on the wasp's tail. Both are acceptable (neither of them is poisonous), but they are the most poisonous to women's hearts.

It means: The most poisonous person in the world is a woman. A woman is more powerful than a poisonous snake or a wasp.

From the novel "The Romance of the Gods" written by Xu Zhonglin in the Ming Dynasty.

Original text: Ziya wrote a letter of divorce, held it in his hand and said: "Madam! With the book in my hand, it is better for the husband and wife to reunite. If you accept this book, they will never be reunited again." He reached out to pick up the book without any care in his heart. Ziya sighed and said: "The green bamboo snake has a mouth, and the wasp tail has a needle. Both are acceptable, but the most poisonous woman's heart?"

Extended information:

The most poisonous woman's heart is Lu Pheasant:

Han Emperor Liu Bang and Lu Pheasant were a couple in need, but the appearance of Mrs. Qi became a serious obstacle to Empress Lu's happy life. There is a saying that goes well: A man loves his second wife, but a woman values ??her ex-husband.

Mrs. Qi was beautiful, good at singing and dancing, and gave birth to a son named Ruyi for Liu Bang. Ruyi was smart and cute, Liu Bang loved his children, and wanted to abolish the elders and establish younger ones, which made Lu Pheasant panic. Fortunately, with the support of all the ministers, Lu Pheasant could keep his position.

After Liu Bang's death, Lu Pheasant took over the power and began to take revenge on Emperor Gaozu's beloved concubine Madam Qi. He chopped off her limbs, gouged out her eyes, deafened her ears, and used drugs to transform her into a queen. She was made mute and then thrown into the cellar half-dead, where she was called a "human pig". As a result, Emperor Hui of the Han Dynasty, son of Lu Pheasant, was so frightened that he fell ill and became bedridden.

This kind of inhumane killing method has appeared more than once in history, but it seems that Queen Lu’s method is unprecedented.

After Lu Pheasant gained power, Zhengzhi became more and more stubborn and sophisticated. In order to eliminate the root cause, she also deceived Mrs. Qi's son Ruyi into the palace. Emperor Hui of the Han Dynasty knew that his mother had ulterior motives and might suddenly commit murderous acts.

In order to protect his younger brother, the emperor stayed with him throughout his stay and meals, never leaving him. But even with his brother's personal care, the young Ruyi still couldn't escape Lu Zhi's clutches. Finally one day, Lu Zhi took advantage of Emperor Hui to go hunting and killed the young Ruyi.