Late at night, the hostel opened by Duanmu's family has an underground secret room.

Under the light of several dim bronze oil lamps, Zheng Dan, whose face was pale, slowly opened his eyes.

This kind of oil lamp burns animal fat, consumes oil quickly, is relatively luxurious, and can only be used by wealthy merchants and nobles.

"Sister Xiuming, are you awake? How does it feel? Zhao Qing's right hand was still against Zheng Dan's back, conveying internal force, and with his left hand, he took a pottery bowl full of medicinal soup and helped her feed it slowly.

"It's not a big problem, it's like getting a good night's sleep. Sister Aqing, don't worry. Thank you for helping me heal. ”

Zheng Dan stroked his cold forehead, sighed lightly, took out a very thin piece of gold leaf from the light red dress on his body, and held it in his hand.

Through the dim light, Zhao Qing saw that there were dense small seal inscriptions on the gold leaf, as well as many pictures of the human body, which seemed to be the exercises practiced by Zheng Dan.

It is not surprising that the cheats about Zheng Dan are engraved on a piece of gold leaf. This is not a purely historical world, and it is very normal for the technological process to be different.

Many of the bronze weapons seen today, such as Peng Yan's Changge and Duanmu Shuliang's copper scales, are obviously stronger than the iron tools in the world of Liancheng Jue.

It can be said that it is quite easy for a master to press out a piece of gold leaf, and it is not necessary to write and engrave on the bamboo slip.

But then again, paper for writing should not have been invented until the Han Dynasty. The papermaking technology does not seem to be very difficult, and the current era should have enough technology to make paper.

Unlike iron-making, saddles, and horse pedals, once invented and spread, they may affect wars between countries, causing a large number of casualties; Papermaking should be a technology that is completely beneficial to the country and the people, but I can try to do it in the future.

"There are gods in the stars, hidden in essence, qi, jin, liquid, blood, and ......veins," Zheng Dan muttered in a whisper, and did not shy away from Zhao Qing beside her.

Is this the method of blood sacrifice to the gods? It doesn't sound evil, could it be that Zheng Dan made a mistake in her practice? Zhao Qing blinked his eyes and thought in his heart.

At this time, there was a slight sound of footsteps overhead, and a thick stone slab on the top of the secret room was lifted, and a tall and thin figure jumped down gently, it was Duanmu Shuliang.

"Miss Zheng, Miss Zhao, there shouldn't be any danger tonight." Duanmu Shuliang refilled the lamp oil on several bronze lamps in the room and said in a deep voice.

"Isn't there any danger, that Hongshang sword master slashed out dozens of zhang Gangfeng with one sword, although it should be an explosive method, but in terms of strength, it has definitely crossed the threshold of Gangjin, and no one in Chungquanyi can match it."

Zhao Qing had some doubts and asked out loud: "Or is it that the other party's method of explosion has strong sequelae and needs to go through a period of weakness?" Even if this is the case, we must not be unguarded. ”

Peng Yan took out the three broken crossbows hidden in the treasury of the city and set them up on the high ground in the city to deter. This kid used to run very fast, but I didn't see that he still had such courage. ”

Duanmu Shuliang opened a large box of steaming food and handed it to Zhao Qing as a supplement for the energy she had consumed for Zheng Dan's qi infusion treatment.

"The power of the Gang Gang Crossbow is enough to pierce through a vertical wall several zhang thick, unless it is a great master who has entered the realm of the Six Qi, it is impossible to completely ignore it. Considering that there are masters of the same level on the side, thinking about it, the secret guard of the Wu State will not expose himself so easily. ”

Taking the lunch box handed over by Duanmu Shuliang, listening to Duanmu Shuliang's explanation, Zhao Qing couldn't help but nod secretly, and asked:

"But we don't really have a master at the same level. In the end, it's just an empty plan. After a few days, the other party will eventually find out that we are just showing what we do. What's next? ”

"Encountering such an obstacle, normally he should go and find his companions, and then attack together. However, I see that you look and are not worried, is there any solution to it? ”

Crossbows, according to legend, have appeared in the Yellow Emperor era, and now in the Spring and Autumn Period, there is a large-scale array.

It is recorded in "The Art of War: Combat": public expenses, broken cars and horses, armor and arrows. The halberd covers the oar, the hill ox cart, and six out of ten. There is a saying in the "Potential Chapter": "The momentum is like a crossbow, and the section is like a start." ”

The Broken Crossbow mentioned here is thought to be a crossbow machine similar to the divine soldier and incorporating the special elements of high martial arts. It can be used not only for large armies against the enemy, but also for balancing the good hands on the rivers and lakes.

It turned out that Duanmu Shuliang saw Zhao Qingqing, he showed good strength and a confident expression, and always thought that she was born in a high-level nobleman, and her ordinary clothes and accessories were just disguises on the outside, so he didn't make a detailed introduction.

But now it seems that she should also be an ordinary Chinese like Zheng Dan who was unexpectedly inherited, and she doesn't know much about high-level state secrets.

As for the "empty city plan" and the like, he thought about it and guessed the general meaning.

Seeing Zhao Qing's doubts about the secret guard of the Wu State, Duanmu Shuliang explained in detail:

"Wu Zixu's Hongshang Sword Master, since its establishment, has been the most complete and capable spy organization among all the countries in the world."

"A considerable part of the reason for this is the influence of Sun Changqing's strategy of war. Hehe, 'soldiers, treacherous ways', it really says the essence of the way of using soldiers. ”

Sun Changqing is Sun Wu, and "Changqing" is his word.

"Under the construction of Wu Zixu and Sun Changqing, Hongshang Sword Master's actions can be described as doing everything, which is not at all what the 'gentlemen' of other countries can imagine."

"The five most powerful countries in the world are none other than Jin, Wu, Chu, Qi, and Qin. Among them, the Jin State is the country with the most intrigues and intrigues except for the Wu State. ”

"For a long time, several families in power within the Jin Kingdom have often fought and been chaotic, and a few years ago, the Zhongxing clan and the Fan clan were destroyed by other families, and the three armies and six secretaries became the two armies and four secretaries."

"How can families cooperate with each other in terms of critical intelligence if they are able to destroy each other? And the spy guards built by a single family naturally cannot be compared with the strength of the entire country of Wu. ”

"The country of Chu has a vast territory and many talents. However, in the early days of the reign of King Ping and the current King of Chu, treacherous and evil have been appointed, resulting in the loss of a large number of talents. ”

"Wu Zixu and Bo Yao, who are now in important positions in the Wu State, as well as Fan Li and Wen Chong, the doctors of the Yue Kingdom, are all from the Chu State."