Glass, which is fired from sandstone, limestone, or quartz. Primitive glass appeared in China during the Warring States period. At that time, the transparency of glass was very low, and it was not much different from porcelain.

The Egyptians, on the other hand, had already mastered the art of making glass at the time of the construction of the pyramids. The resulting glass is not yet completely transparent, but its purity is quite high. Later, the art of making glass spread from Egypt to various European countries.

Therefore, after the opening of the Silk Road in the Han Dynasty, merchants in the Western Regions sold glass products to China. The glass made by the people of the Western Regions is several grades purer than the glass of the Central Plains, so that the people of the Central Plains do not regard the glass of the people of the Western Regions as the same kind of item at all. Although the cost of glass is very low, the price in China is quite high. And only luxury homes can afford it.

The earliest glass in ancient China was called "Xuanlin". From the Han Dynasty to the Ming Dynasty, locally made glass was called glaze. After the Ming Dynasty, the Chinese themselves were able to make glass with high purity, and the glass at this time was also called "jar jade", probably the glass at that time was mainly used to make jars. The word glaze in the Ming and Qing dynasties has become the name of another material.

The glass sold by the people of the Western Regions in the Central Plains was called "medicinal jade" in ancient times.

The "medicinal jade" that Zhao Yunze said at this time refers to glass. As soon as he revealed Luo Yun and using glass to fake the elixir, Li Yuan's brows furrowed.

"Peng Yu, if you don't understand the art of alchemy, don't talk nonsense," Li Yuan said to Zhao Yunze with a very unhappy face.

Luo Yunhe's face was not good-looking, he defended: "Everything can enter the pill, it is right that this seat has added sand and limestone to the pill, but Xiaoyou can't compare the immortal pill of this seat with the medicine jade of the playful instrument."

"Everything can enter the Dan" Zhao Yunze smiled, and then asked Luo Yunhe: "Can big dung also enter the Dan?"

"The madman is going to defile my Taoist treasure," a Taoist priest immediately reprimanded Zhao Yunze angrily.

Luo Yunhe smiled, and said to Zhao Yunze without being angry at all: "Naturally, feces can also enter the Dan. Xiaoyou doesn't know that the five spirit fats in the medicinal materials are the dried feces of the flying squirrels and my immortal family pills, and they also want to add secular medicinal materials. Huh"

The Taoist priest who reprimanded Zhao Yunze just now was a little embarrassed after listening to Luo Yunhe's words. He reprimanded Zhao Yunze for using the word "dung" to defile Taoist alchemy, but Luo Yunhe pointed out that dung can really be used for alchemy, which is slapping him in the face.

Zhao Yunze was speechless at this time. This Luo Yunhe's eloquence is really amazing, I can't even disgust him.

"Peng Yu, you are still young, this Taoist matter is mysterious and mysterious, and it is not something you can understand. Don't apologize to Immortal Master Luo yet," the good old man Li Yuan spoke again.

Zhao Yunze saw that Li Yuan was still obsessed, so he was ruthless, and said to Luo Yunhe: "Immortal Master Luo, if you only have medicinal materials in your elixir, you naturally have no objections. However, as far as I know, in Taoist alchemy, many people add mercury, lead and other substances to the elixir. And these things are harmful to the human body. If you take too much, you will be poisoned."

"Hehe, Poor Dao Alchemy has been taking pills for twenty or thirty years, the pill you said added mercury, lead and other substances, Poor Dao doesn't know how much he has taken, why haven't I seen Poor Dao poisoned, Poor Dao is radiant" The Taoist priest who reprimanded Zhao Yunze just now can be regarded as having found an opportunity to suppress Zhao Yunze to show off himself, and hurriedly said.

Zhao Yunze glanced at the Taoist priest and saw that his face was pale without a trace of blood, and his eyes were dark as if he had put on smoky makeup. His hair and beard were also thin. The hair was in a small bun on the top of the head, and the scalp was exposed beyond the bun.

Hehe, with your complexion, you are still radiant, I see that you are not far from the deadline. Zhao Yunze said in his heart.

"Dare to ask this Taoist leader, have you lost your hair and beard seriously in recent years," Zhao Yunze asked the Taoist priest.

"Yes so what" the Taoist priest looked proud.

Zhao Yunze arched his hand at Li Yuan and those Taoist priests again, and said, "Emperor Taishang, all the Taoist leaders, you have also heard that this Taoist leader's hair and beard are falling out, which is exactly the symptom of pill poisoning. Among all the Taoist elders, there must also be people who know how to heal, dare to ask, healthy people, will a lot of hair and beard fall off If it is said that this is due to the spirituality of the elixir, then I will ask you again, is it possible that the gods in the sky are all bald and bald?"

As soon as these words came out, Li Yuan and those Taoist priests all pondered. The Taoist priest who rebuked Zhao Yunze also turned ugly.

And Luo Yunhe, at this time, stared at Zhao Yunze with a cold face. He was also thinking, he was thinking about how to refute Zhao Yunze.

"Emperor Taishang, the minister said that the pill is poisonous, not a lie. If you don't believe it, just send someone to find a kitten or puppy, feed it with pills, and see its reaction to see if what you say is true. Zhao Yunze said to Li Yuan again.

Li Yuan squinted his eyes and pondered for a while, then his eyes opened, and he said, "Come on, go and pick up a cat."

Immediately one of the dressed men who stood in the temple answered the promise and went out of the main hall.

"My disciple" Luo Yunhe wanted to speak again. Li Yuan raised his hand to stop him. "Luo Zhenren is not in a hurry, when the cat is brought here, he knows right and wrong." Li Yuan said.

Zhao Yunze was secretly relieved to see that Li Yuan's eyes were clear at this time, and he heard him call Luo Yun and Wei "Luo Zhenren" instead of the previous "immortal master". Old Man Li has finally regained his wisdom as an emperor. As long as he became suspicious of the elixir, it would be fine.

The people in the hall fell silent. After a while, the eunuch who had just gone out re-entered the temple with a cat in his arms.

"Feed this elixir to the cat." Li Yuan directly ordered the eunuch.

"Wait" Zhao Yunze stopped the eunuch's movements at this time.

"Peng Yu, it was you who proposed to use cats to test whether the pill is toxic or not, but why did you stop it" Li Yuan looked at Zhao Yunze puzzled.

"Emperor Taishang, Fang Caichen also said that today's elixir is actually a medicinal jade with condiments. Although medicinal jade is not food, after entering the abdomen, it can be dissolved by gastric juice. There is no major harm to the human body. The minister speculated that the pill that Luo Zhenren refined today was green, and there must have been a lot of medicinal materials added to it. It is also unknown whether lead or mercury is added to it. Therefore, if the medicine is fed to the cat, it cannot be used today's pill. Zhao Yunze explained.

Li Yuan was stunned for a moment, and then looked at Luo Yunhe. At this time, Luo Yunhe couldn't sit still.

"Luo Zhenren, you tell the truth, what is the ingredient of today's elixir" Li Yuan asked Luo Yunhe with a cold face.

"Just as Zhao Xiaoyou said, today's Dan is smelted into juice with sand and limestone, and then mixed with some fresh medicinal juice to cool and form." Luo Yunhe saw that Li Yuan's face was not good, and he seemed to be so frightened that he forgot to pretend to be his superior demeanor, and replied in a slur manner.

"Then take some of the pills you refined in the past." Li Yuan said to Luo Yunhe again.

Luo Yunhe hesitated for a moment, and finally reluctantly responded: "Okay." ”

And when he had said that, he got up and walked out of the temple.

"Dou Bao, you go with him," Li Yuan commanded a man in a Taoist robe standing beside him. This man was about fifty years old, but his jaw was bare, and he looked like an old eunuch.

"Obey the order", the old eunuch followed Luo Yunhe out of the hall.

After a while, Luo Yunhe and Eunuch Dou returned, and Eunuch Dou opened a porcelain bottle, poured out a bright silver pill, and handed it to the little eunuch who was holding the cat.

The little eunuch forcibly fed the pill to the cat. The people in the temple watched the cat with wide eyes.

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