It's just that Gu Fengchun feels uncomfortable with so many people behind him. He knew that with his current outstretched hand, although he couldn't carry the mechanism here, he still had the speed to dodge, and it was not good to have obstacles behind him. But he won't say this casually, Xiao Zhonghua and Bazi are both first-class masters, whether it is reaction speed or strength, they are all good hands. With them guarding behind you, your back is absolutely safe.

"It's really a door." After Chen Si scraped off the patina around the protruding frame with a military thorn, he made an affirmative statement: "It's still a big copper door." Gu Fengchun said with a wry smile. But taking advantage of this time, Gu Fengchun touched the copper door with his palm, wanting to sense the age of the copper door. It's a pity that his own ability has no effect on this temple of ruins, and he knows that the buildings here have long exceeded the age he can sense.

"Would you like to try how to open it?" Chen Si asked in an inquiring tone.

"What do you say?" Gu Fengchun and Chen Si glanced at each other, and both of them let out a knowing smile. Both of them were extremely curious people, and when they found out that there was a porter, they would never miss the truth in vain. What's more, they have been shuttling through narrow passages all the way before, and they haven't gotten any useful information, so they also urgently need to find more useful information, and this door room may have some useful materials for them. "This bronze door is too big, I don't know how to open it." Gu Fengchun observed it carefully, frowned and sighed. The bronze door is also engraved with thundercloud patterns, which look antique, but due to the age of time, these patterns have long been eroded by patina and are very blurred. Gu Fengchun didn't find anything like that on this bronze door, that is, he couldn't find a way to open this bronze door. However, he wasn't particularly anxious, because there was a mechanism master next to him.

Chen Si didn't speak, and pushed the copper door with his hand, but the copper door didn't move. Chen Si also expected this outcome. He frowned, scrutinizing the surroundings of the bronze door.

"Tell me to scrape the walls around here." Chen Si immediately issued an order. The surrounding walls were covered in green patina, and it was not easy to find something.

Xiao Zhonghua nodded when he heard this, and immediately issued instructions with the communicator to do what Chen Si instructed. Everyone took out sharp weapons and pressed close to the surrounding walls, scraping the rust off. But the most fierce is the United States, they actually took out bottles of transparent liquid from their backpacks, put gloves on their hands, and took out something similar to a sponge, poured these liquids on it, and then wiped it the wall, and the rust on it immediately melted. However, the GIs were also surprised that the acidified copper, which had dissolved into a liquid, did not drip under their feet, but flowed towards the ceiling above their heads. Fortunately, they have already seen this kind of strange thing, and the reaction is not particularly strong.

Gu Fengchun frowned in surprise when he saw the strong acid they were using, and asked, "What is this, it can melt metal so quickly?" ”

Chen Si smiled and said, "This is the SS-12 acid that only the most elite special forces in the United States have. Specially researched to destroy solid metal buildings, some code doors were too hard for bullets to penetrate, so they simply dissolved them with acid, and the concrete was poured on them, making them soft as dough. We're also working on this acid, and it's even better than theirs. But no matter how good it is, it can't compare to the venom released by the leeches we just encountered. That venom is the strongest acid in the world. ”

Gu Fengchun nodded, his understanding of the advanced science and technology of the people of the United States is not only in the aspect of hearing and hearing, he has also witnessed the high-tech of many people of the United States, and knows well where the gap with his own country is. However, fortunately, our own country has a very strong ability to imitate, and by innovating on the basis of imitation, we have created many weapons suitable for use in our national conditions.

Soon, under Chen Si's command, everyone cleared a large area on the walls on both sides. Chen Si was very satisfied with this speed. Moreover, he also made new discoveries.

In a place where the rust was cleaned up, Chen Si found a depression that seemed to have been destroyed, but the destruction was in a hurry, and it did not hurt the main place, and then it was filled with a substance of unknown composition, which was washed by the strong acid of the soldiers of the United States, and the thing immediately disintegrated, exposing the depression. Chen Si found that in the place where the depression went down, there was a mechanism inside. When he looked closely, he smiled.

Hidden inside is a cipher wheel. The cipher wheel was basically the same as what he had used outside before. Chen Si's smile only lasted for a few seconds. He only found the boot device, but he didn't know the password to boot it.

"A password is required to open it." Chen Si frowned, and then looked around, trying to find a hint from the wall as before. "It's strange, there's no information at all." Chen Si muttered.

"Maybe it's the same password here." Gu Fengchun said with a deep groan.

"Well, it's quite possible." Chen Si glanced at Gu Fengchun, and then said, "What was the previous password?" Is it 63644950? "Chen Si has a good memory.

"Not bad." Gu Fengchun was very impressed by this set of data, and when he heard the figures reported by Chen Si, he checked them and confirmed that they were correct.

Chen Si nodded, he was as cautious as ever, and said to Gu Fengchun: "Retreat, pay attention to the changes in the surrounding environment, if it's not good, you know how to do it." ”

Gu Fengchun shrugged his shoulders and said with a wry smile: "I really don't know. "Gu Fengchun is telling the truth. If the password is wrong and the mechanism is touched, then this area will definitely be covered by the traps designed by the predecessors, and it will not be so easy to escape.

Chen Si shook his head, stopped talking, and went to the engraving on the wheel. Compared to the previous ones, these carvings are much easier to rotate, and they are not eaten by patina, it seems that the air is blocked by those substances that are blocked outside and do not know the composition, and the turntable is protected. With the continuous sound of "click, click", Chen Si turned the eight numbers one by one, and there were only eight numbers, but it took him almost five minutes to get them done.

"Boom ......" After turning the password, Chen Si heard a vibrating sound coming from under his feet.