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What do you mean by residue?

The basic definition of residue is:

1. Residue after decoction of traditional Chinese medicine.

2. Insoluble residue left after extracting a substance (such as medicine) with a solvent.

Treading disability, Han folk beliefs and customs. Popular in Jiangsu, Zhejiang and Shanghai. The patient ate Chinese medicine, dumped the dregs on the road and let thousands of people step on it.

The origin of the word "love rat" that is often used on the Internet is that one day, when the emperor saw his concubine with a sad face and poor skin color, he called the physician urgently. The doctor prescribed: eight strong men. A few days later, the emperor went out to visit the palace. I was overjoyed to see the princess radiant. Suddenly, I saw eight thin people filed out in front of the temple and asked in surprise: Who? The doctor replied: scum!

"Poison man" now generally refers to a selfish, acquisitive, irresponsible man who plays with others' feelings.

Extended data:

There are two kinds of folklore about trampling on dregs: one is that it can drive away diseases and eliminate disasters, and it is believed that the root of the disease will move to dregs after patients take medicine. Once dregs are trampled by others, the root of the disease will be taken away and the disaster will move to others.

You can tell the authenticity of herbs. Legend has it that when Li Shizhen was looking for herbs in Jiangnan, a sick woman groaned. After feeling the pulse, he took out herbal soup from his bag and gave it to the patient. As a result, the medicine was cured. The sick woman was deeply moved and complained that the herbs given by the quack had no effect after eating them. Li Shizhen a listen to, immediately let her take out the dregs, a look at carefully, are fake.

After the masses knew about it, they took out the medicinal materials matched by the quacks and fell to the ground, so that Li Shizhen could check them one by one and eliminate the counterfeit drugs. Afterwards, everyone dumped the dregs on the road, hoping that Li Shizhen would pass by for inspection, which became a custom over time.

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