Several people set up the alchemy furnace, and took out the yellow sand inside. After so many years, naturally there will be no more valuable things, but Hong Wan still looked at the alchemy furnace carefully, and then said: "Judging from the colors in the alchemy furnace, this alchemy furnace has been used for a long time, but there must still be corresponding records in any alchemy room, especially some alchemy experiences. At that time, most of them still used bamboo slips. It's unlikely, but everyone should look for it, especially pay attention to whether there are any hidden compartments and passages.

Not to mention Xu Fu, even ordinary alchemists, in his alchemy room, he would set up a secret passage for escape, not to mention that Xu Fu was refining the elixir of life back then, and he couldn't guarantee that the people around him would , Will there be any coveting heart? "

Xia Dongyang was very much in favor of this point, and a dozen people took action to find such an alchemy room of tens of square meters, which was enough to search every corner and every brick of the alchemy room, and all the people present were engaged in security. Ordinary people are more careful.

Not to mention Xia Dongyang, perhaps this is also one of the reasons why Liu Fanyu wanted to find him. Xia Dongyang also searched carefully, and soon found a clue at the corner of the wall on the right. There was a sound of 'rumbling' stone moving on the side.

"what!"

At the same time, there was a scream. It turned out that Tang Xuefeng was standing at the entrance of the secret passage. When two floor tiles were turned downwards, he fell straight down following the yellow sand buried above. The bodyguard Zhou Han Jiang separated from him just now, and it would be beyond his reach to pull him now.

Xia Dongyang and others immediately surrounded it, and saw that it was a large square door with a side length of [-] centimeters, with a break in the middle and turned downwards. Tang Xuefeng happened to be standing on top of that brick.

Zhou Hanjiang immediately asked eagerly: "Mr. Tang, Mr. Tang, are you okay?"

After all, this secret passage has been covered in dust for many years, let alone air, it is possible that it is full of poisonous gas. As expected, Tang Xuefeng did not answer, and with the searchlight on, Tang Xuefeng was vaguely seen lying at the end of the stairs of the secret passage , the most important thing, just now this place was also buried with a layer of yellow sand, and there will be a secret passage opening, and the yellow sand on it will sink. Tang Xuefeng happened to be lying on a pile of sand, and he would be suffocated to death after a long time.

Zhou Hanjiang went down without saying a word. With his physical fitness, it should be no problem to hold his breath to get Tang Xuefeng up, and everyone did not stop him, and stepped aside to ensure better air circulation.

Soon, Zhou Hanjiang brought Tang Xuefeng up. On the surface, Tang Xuefeng didn't have any wounds. He must have fainted from the fall. Zhou Hanjiang pinched him hard, and he woke up just now, thinking about what happened just now. Suddenly, his fair face blushed with embarrassment, but he justified himself: "Am I the first person to discover the secret way in more than 2000 years?"

"Yes Yes!"

Everyone nodded, not wanting to embarrass him too much.

Tang Xuefeng could also hear the perfunctory in everyone's tone, and smiled embarrassingly. At this time, the man who was surveying all the way looked at the testing instrument in his hand and said to Hong Wan: "Miss, although the air inside is not good, it is still barely able to get in."

Hong Wan was not in a hurry, and said, "Wait and see, there is no need to take risks."

After speaking, she still said to Xia Dongyang and the others: "Everyone should have brought small oxygen cylinders, check them all, maybe they can be used inside."

Looking at her like this, it didn't seem like she was facing such a situation for the first time. Everyone checked the equipment, and then installed the equipment to ensure that they could put on the oxygen breathing mask as soon as they found something wrong.

After waiting like this for about 10 minutes, the air quality improved a lot before everyone entered the secret passage. The surveyor was still at the front, followed by Hong Wan, followed by Xia Dongyang, and the rest were free to line up. , it doesn't matter before or after.

After going down, I saw that the place where Tang Xuefeng was lying just now was just a turning point, and the passage then turned to the right. This should be a buffer design, and there is a bronze mirror placed at the corner, just like some villages. On the highway, where there is a sharp turn, a convex mirror will be erected to see if there is a vehicle coming from the other side.

However, the copper mirror was already covered with verdigris. Kong Liang reached out to grab the bronze mirror, but was scolded by someone beside Hong Wan: "What are you doing, stop!"

Everyone stopped, and Kong Liang said without any concealment: "If you have something, don't take it for nothing, right?"

Hong Wan's face darkened, and she said, "Shut up, these are cultural relics, even if the relevant state departments haven't had time to excavate and protect them, we can't keep them for ourselves."

But Kong Liang said: "Miss Hong, you are rich, so you don't like these things, and of course you don't know the lives of the poor, but this time you came to carry out the task, which one is not for money, and you are not from the relevant department, why bother?" Well, it's convenient, open one eye, close one eye!"

Hong Wan said seriously: "It's not a matter of having money, it's a matter of principle, we came here only to find relevant medicines and materials, and nothing inside can be touched, you'd better listen to me, otherwise, we will Let you go out, I believe that Mr. Liu will agree with what I said, right?"

How dare Liu Fanyu say no, he nodded repeatedly: "That is, that is, Miss Hong understands righteousness, Mr. Kong, you should not make things difficult for everyone."

Kong Liang bit his back teeth and nodded, but his heart was full of resentment. He walked along the passage to the depths. It can be judged that the passage has been going down, and every seven or eight meters , there will be a turning point, and a bronze mirror will be placed at the turning point.

Hong Wan couldn't help sighing: "This should be the principle of using a periscope. If the bronze mirror is still bright and has a light source, using the principle of refraction, you can see whether someone is breaking in from the inside. The invention more than 2000 years ago is really amazing! "

Xia Dongyang also saw the way, and felt emotional in his heart. He didn't know who the people involved in this construction were, and whether there were any records in history.

The group went straight down the passage, and on the way they didn't encounter those inside the institutions that were encountered in the TV movies. After walking like this for about seven or eight minutes, they saw a reflection in front of them, and the space was much larger.

Taking a closer look, everyone was shocked, and saw that there was an underground river below, and there was a pill furnace standing beside it. Judging from the layout of the holes on the surrounding walls, it was obvious that this place was It is a real alchemy place.

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