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Gu Qinglan used a Luoyang shovel to beat on the iron plate, and said:

"It should be hollow, but because the yellow sand around it absorbs the zhèndàng waves, the echo inside is not easy to detect.

"It must be hollow, if yàoshi is solid, such a thick and long iron pillar should not have been able to be cast in the past." Ji Xiaoxiao also said.

Ding Ermiao nodded, and took Ji Xiaoxiao to the bottom of the pit again.

Ding Ermiao walked down, Gu Qinglan gave way to the side, and rested against the pit wall.

Ding Ermiao turned on the flashlight and looked at the iron plate cover for a long time, then suddenly turned around and asked Gu Qinglan, "Sister Lan, in your preparation, is there anything that can drill iron?" ”

"Drills?" Gu Qinglan was stunned for a moment, and then said: "There is a very small hand-cranked diamond, the diamond head is okay, and the drill iron plate is not good." ”

"It's good to have a drill, let's try it first!"

Ding Ermiao was a little excited, pointed to the iron plate cover, and said:

"Since this iron plate cover is synthesized by the Yin Yang Fish, the most likely location where the mechanism is located is above the eye of the Yin Yang Fish. I want to drill out of the two fishhole positions and then kànkàn. ”

Gu Qinglan nodded, walked out of the sand pit and went to get the drill.

But Ding Ermiao lay down again, took out the compass, and carefully determined the position of the fisheye.

When Gu Qinglan retrieved the drill, Ding Ermiao also made a mark on the fisheye position.

took the drill and looked at it, Ding Ermiao nodded, and said, "It should be usable, but I'm afraid the drill bit is not long enough." ”

The drill bit was the thickness of the chopsticks, only three inches long.

Saying that, Ding Ermiao squatted down, first started from the fisheye position of Yangyu, put the drill bit against the iron plate, and shook the handle.

The drill bit rotates and rubs against the iron plate, making a grinding sound.

Ding Ermiao drilled for a long time, and when he lifted the drill bit, he saw that there was only a small concave point on the iron plate, which could put about a mung bean.

"Ermiao, you rest for a while, I'll come?" Gu Qinglan said.

Ding Ermiao wiped her sweat and said, "Okay, hard work Sister Lan." But if Sister Lan wants to drill, start drilling from another fisheye, I'll do it myself. ”

Gu Qinglan felt strange and asked, "Why do you want to do this?" Wouldn't it be faster for both of us to start from one place? Isn't it another waste of time to drill another one? ”

"Uh......, Sister Lan doesn't know, this yin and yang fish, as the name suggests, is divided into yin and yang. Therefore, I think it is best to drill yin and yang together, which is in line with the way of yin and yang. Ding Ermiao explained.

Ji Xiaoxiao rolled her eyes and said, "I understand, Er Miao is Yang, Sister Lan is Yin, you are a man and a woman, one yin and one Yang are in line with the original meaning of Yin and Yang, right?" ”

Ding Ermiao nodded approvingly.

Gu Qinglan blushed, stopped talking, squatted down and started drilling from the position of another fisheye.

"Ermiao, the pattern of this yin and yang fish, the same size, and there are no words on it, how do you distinguish yin and yang? What if Sister Lan is over there, the yang fish that is drilled? Ji Xiaoxiao asked while flashing a flashlight to Gu Qinglan.

"I'm guessing, yin and yang are confused, it's not a big deal, anyway, yin and yang rotate, it's like this." Ding Ermiao said.

……

In the past half a day, Gu Qinglan's side also opened a small concave point, maintaining the same progress as Ding Ermiao's side.

After three or five rotations, it was already getting bright.

Ding Ermiao is not tired, and Ji Xiaoxiao is also energetic because she has taken Toad Neidan.

But Gu Qinglan and Zong Ruixiang were a little sleepy and sluggish.

Especially Zong Ruixiang, after all, he is a little old, and he has not rested for a day and a night, at this time, he yawns all day long, and the eye feces in the corners of his eyes are the size of broad beans.

"Sister Lan, it's dawn now, you can rest for a while. I'll do the drilling work first. Ding Ermiao arranged.

The small hole in the iron plate has been drilled to a depth of more than an inch, and Ding Ermiao estimates that it is not far from a breakthrough.

"Okay, I'll take a break."

Gu Qinglan didn't insist, walked out of the sand pit, spread plastic sheeting on the ground, used the shovel handle of the Luoyang shovel to cover the sun with a coat, and lay on the ground to rest.

Although such a sleeping position is a little indecent when exposed in front of everyone's eyes, but in the wild, there is not so much attention.

In order to avoid suspicion, Zong Ruixiang also walked into the sand pit and rested in the change of seasons.

In this case, what are the two beauties doing above, Zong Ruixiang and Ding Ermiao can't see it below, and everyone is not embarrassed.

Ding Ermiao and Zong Ruixiang sat on the iron plate lid and ate something. There was also liquor brought, and the two of them drank a little bit each, so as to refresh themselves.

After a short rest, Ding Ermiao continued to drill. Fortunately, this drill bit can still be used, and there is a backup drill bit.

More than two hours later, Gu Qinglan and Ji Xiaoxiao walked in again, changed Ding Ermiao's class, and continued to work.

Zong Ruixiang came to spoil the fun again, and said: "Senior sister, Ding Ermiao, I think this is useless work." First of all, our drill bit is not necessarily long enough, and secondly, even if we drill through this iron plate, what can we do? Are you absolutely sure that you can open the iron plate? ”

"Senior brother, you have nothing to do, don't give us relief here." Gu Qinglan was angry and glanced at Zong Ruixiang.

Zong Ruixiang smiled, climbed out of the sand pit, and slept on the plastic sheet just now.

Ding Ermiao didn't shàngqu with Ji Xiaoxiao, half leaning on the pit wall of the sand pit, looking at the blue drilling.

Because of drinking a little wine and being tired all night, Ding Ermiao leaned on the slope of the pit wall, and gradually became sleepy, so he closed his eyes and wanted to squint for a while.

It seemed that he hadn't slept for long, when he heard a cheer from Gu Qinglan and Ji Xiaoxiao, Ding Ermiao woke up suddenly.

"What's wrong, Xiaoxiao, Sister Lan?" Ding Ermiao rubbed his eyes and asked.

"It's through!" Gu Qinglan said excitedly: "Er Miao, it's through!" ”

Ji Xiaoxiao also smiled and nodded again and again.

Ding Ermiao hurriedly stepped forward and bent down to look at the hole that Gu Qinglan had drilled.

The hole is so small that you can only put a soybean in Jinqu. Ding Ermiao shone inward with a flashlight, but he couldn't see anything.

"Such a small hole, you can't see it." Gu Qinglan said.

Ding Ermiao nodded, leaned his ear on the small hole, and tapped the iron plate cover with the sapper shovel.

Bang Bang ......

A little echo can be heard in the ears, buzzing, short and dull.

"It's hollow." Ding Ermiao raised his head, took the hand-cranked drill in Gu Qinglan's hand, and then drilled the hole on his side.

The time is not big, Ding Ermiao only feels that the strength in his hand is empty, the drill bit is planted down, and the iron plate cover has been drilled through!

"Through?" Gu Qinglan asked.

"That's it." Ding Ermiao nodded, shone it with a flashlight, and looked down from here.

But the hole was only so big, so Ding Ermiao looked at it for a long time, but still found nothing.

"It's a black hole inside, you can't see anything...... Ding Ermiao frowned and said, "However, it seems that there is earthly qi, and it is gradually surging." ”