Ruan Jingtian pondered how to return to Dongshan City. Yesterday he killed all sides, and there was a lot of commotion in Dongshan City, and if he wanted to enter the city today, he must be subjected to very strict interrogation. He didn't dare to continue to pretend to be a Zheguo devil and drive a truck into the city, because the Shizixiang checkpoint was terminated, and the devil would definitely know, so this truck was a live target. The certificate of the Zheguo warrior he held was also unreliable, because the origin of the certificate was too big, and the original holder of the certificate had been killed. If he goes back to Dongshan City alone, it is not very difficult, and he can sneak in at night, but there is a helpless Li Butterfly right now, which increases the difficulty by not one or two points.

Ruan Jingtian looked at the outside of Rabbit Ridge, about two miles away from Rabbit Ridge is Xiaoling Village, the village is not big, but there is a road outside the village that leads directly to Dongshan City, so there are often some vendors in Xiaoling Village who go to the countryside and villages. Nguyen Ching Tien thought of what had been seized at the Shizi Township checkpoint. There were a lot of these things, including six Type 49 rifles, a light machine gun, a pistol, a military radio station, a truck, eight sets of devil uniforms, ammunition and some food.

Ruan Jingtian left a bag of flour, put other things and his own submachine gun into a dry cave, drove the truck into the remote mountain road, camouflaged it with branches, and then said to Li Butterfly: "Senior sister, pack up, we are ready to go." ”

Ruan Jingtian put on the makeup of himself as a dark-faced vendor, picked up the flour, and said to Li Butterfly: "Senior sister, wait a while in front of others, don't call me senior brother, call me cousin, I will call you cousin." Let's find a way back to Higashiyama Castle. ”

When Ruan Jingtian and Li Butterfly walked into Xiaoling Village, they saw a group of people driving ox carts out of the village. A middle-aged man who looked like a village chief walked in front and muttered: "There is not much food, the devil must be dissatisfied, what can I do?"

Ruan Jingtian heard the village chief's whisper from a distance, knowing that this was to hand over food to the devil, his heart moved, and he hurriedly shouted: "Sell white noodles! Sell white noodles! Come and buy it, just this bag, and leave when you sell it!" Li Butterfly also helped shout.

When the village chief heard this, he immediately drove the ox cart to Ruan Jingtian and said, "Little brother, how do you sell this side, I bought it." ”

Ruan Jingtian glanced at him and said, "You are the village head, you are going to Dongshan City to pay grain." ”

"Yes, there is really no food in the village, but the devil is in a hurry, you white noodles, but the devil's favorite, one bag can be exchanged for many bags of stick noodles, you make a price." ”

"Village chief, I don't want money here, I just ask you for a favor. ”

"You say, as long as you can help, I don't have a word. ”

"My cousin and I didn't bring the Shunmin card, but we are in a hurry to go back to Dongshan City, can you help us enter the city?"

"No problem, I'll get you two obedience certificates. ”

"Thank you, village chief, we still have some things that we don't want the gendarmerie to see, can you help hide these things in the car?" Ruan Jingtian said about his and Li Butterfly's pistols and daggers, he left the big submachine gun in Rabbit Ridge, but the pistol and dagger were necessary for his self-defense, and he always carried them with him.

The village chief saw the small bag in Li Butterfly's hand, hesitated for a while, looked at the bag of white noodles, and said, "Okay, but you have to hide it in the bottom layer of the ox cart, and if you don't get it right, you will lose your head." Of course, the village chief guessed that these things might not be ordinary contraband, but he would not be too idle to ask what they were.

Ruan Jingtian and Li Butterfly were overjoyed, hurriedly thanked them, and put the white noodles in their hands on the ox cart, and the bag containing the gun and dagger was stuffed into the most secret place of the ox cart.

At noon, the group entered Dongshan City very smoothly, although the gate of the city was heavily guarded and carefully checked, but they still had a thrilling pass.

Ruan Jingtian took back his bag and gave the village chief four gold leaves, and he and Li Butterfly said goodbye to the village chief of Xiaoling Village, and came to another hidden place of Ruan Jingtian--- the small courtyard of Tiehat Hutong. Ruan Jingtian didn't want to take Li Butterfly to the small bungalow in Longyin Lake, because there were many secrets hidden in Ruan Jingtian, and he and Li Butterfly only had contact for one day, although they were called senior brothers and sisters, but after all, they were not familiar with each other. Besides, this small courtyard, he hasn't been here for a year, and now it's not bad to come and see.

Ruan Jingtian asked Li Butterfly to pick a room, and he also found a room to clean up briefly. Li Butterfly saw that there was a kitchen and a stove, so she said to go out to buy some ingredients and cook at home. Ruan Jingtian gave her some banknotes, broken silver, and gold leaves, and then Li Butterfly went out with the basket.

In the afternoon, Li Butterfly went out to buy bedding, clothes and other daily necessities. Ruan Jingtian sat at the table and looked at the texts that he had found from the warriors of the Zheguo who recorded secrets. His eyes were fixed on the name of the caster. Why did Shi Zhan carry the black pot for him? This question gradually filled Ruan Jingtian's head. He didn't want others to suffer for him, and he felt the efficient intelligence gathering ability of the Zheguo Water Agency, and he always felt that it was a conspiracy against him. But is it useful to go to the hidden places that he is going to use now? Because the information in his hands comes from the Zheguo people, and he is wanted by the Zheguo people, then these hidden places must be stared at by countless eyes, even if he is good at the art of disguise, I am afraid that he will not be able to deceive the water mechanism. But if Ruan Jingtian doesn't go to these places, he may never find it.

Ruan Jingtian pondered the gains and losses repeatedly, and finally decided to go to one of the places located in Yutong Street, which is not far from the Iron Hat Hutong, which is characterized by being surrounded by many shops and shops, which is easy to run away.

After Li Butterfly came back from purchasing, Ruan Jingtian told her that if he couldn't come back before tomorrow night, let her not wait for him and immediately go to Xiaomiao Township to find her father. Li Butterfly didn't ask much, just stared at Ruan Jingtian and nodded.

The hidden place of Shi Zhan on Yutong Street is a silk shop, and Ruan Jingtian can't help but admire Shi Zhan. The shop is easier to hide and escape, which taught Ruan Jingtian another lesson, and he decided to set up a shop in a few days in case of emergency.

Ruan Jingtian observed around the silk shop for a while, and found nothing unusual, although there were many people around, it was difficult to distinguish which person was an agent at a glance. He walked into the silk shop, which was filled with few customers, mostly middle-aged men and women.

Ruan Jingtian looked at it for a while, and saw a rope pulled next to the counter, and a small lantern was hanging on the rope, flashing and flashing, very beautiful. Ruan Jingtian admired Shi's business experience a little, but he didn't expect Lao Shi to have a lot of fancy ideas. He saw all kinds of silk and satin, and suddenly remembered Li Butterfly's clothes, Li Butterfly's clothes were very simple, probably the same as Li Ji's business, and he didn't have the money to buy such a high-grade silk. A thought flashed through him, pointing to a pale blue silk, and he said to a little girl behind the counter, "Bring me this." ”

"How much do you buy, sir?"

Ruan Jingtian had never had experience in buying fabrics, so he had to roughly compare Li Butterfly's figure, and the little girl roughly estimated it and pulled a piece of silk for Ruan Jingtian. Ruan Jingtian really didn't notice the abnormality of the silk shop, so he had to take the silk and leave.

"Could it be that Shi Zhan was caught by the Zheguo people?" Ruan Jingtian had to think so.

He was not reconciled, and went to another hidden place where he was performing, which was also a shop, which sold shoes. Around this shop, Nguyen Ching Tien still didn't notice anything unusual. He entered the shop and looked at all kinds of men's and women's shoes, and there was a rope pulled by the counter, and a small lantern was hung on the rope, which flashed and flashed. Ruan Jingtian thought to himself: Lao Shi's style is really consistent, the silk shop is a small lamp, and the shoe store is also a small lamp, which is really interesting.

He turned around, bought a pair of shoes for himself and Li Butterfly, and when he took out the broken silver to settle the bill, he looked at the flashing small lamp, and casually said to the little girl in the cashier: "This little lamp in your store is very interesting." ”

"Sir, what I didn't have before, but three days ago, our boss installed it, which is quite interesting. ”

"Oh, your boss really thinks. Ruan Jingtian said casually. Suddenly, a flash flashed in his mind, and he carefully observed the small flickering light. Finally, he noticed that the little light flickered very regularly, and every three minutes, this pattern was repeated, and he silently wrote down this pattern, and said, "Hehe, your boss has a really good idea, is he in the shop? I want to get acquainted with your boss." ”

"Sorry, the boss isn't there. He hadn't been in the store since he installed the little light that afternoon. However, the boss often doesn't come for many days, so if you come back in a few days, you might be able to meet the boss. ”

Ruan Jingtian thought to himself: As expected. He had a bold idea when he heard the clerk say that it had been installed three days ago, and guessed that it had been installed in the afternoon three days earlier, because three days earlier, near noon, there had been an assassination in the town square. Shi Zhan returned to his two shops that afternoon and installed small lights.

Ruan Jingtian took two pairs of shoes, quickly returned to the Iron Hat Hutong, gave the silk and shoes to Li Butterfly, went into his house, wrote down the law of the small lamp flickering on paper, and carefully studied the law. He tried several methods and did not find an idea. He was convinced that the pattern of the lamp's flickering was to send some kind of signal.

Ruan Jingtian couldn't understand the meaning of this signal, and instead pondered why he did it? After the assassination operation three days ago, who did he send such a signal? Obviously, it was not passed on to Ruan Jingtian, because Ruan Jingtian did not know about his two shops at all. Although he was in charge of intelligence work, he did not investigate the habits of his own people.

Obviously, Shi Zhan wants to pass this signal to the people who know these two shops, so who will know that these two shops are being performed?

This signal has been passed for three days and continues to be transmitted. If Shi Zhan can continue to control these two stores, then it means that the person who received the signal has not been to the store until now, and Shi Zhan is still waiting for this person, and if Shi Zhan is arrested or runs away, it will be a different matter.

Suddenly, he remembered a problem: a lamp can only have two states, on or off, which is the most direct and simplest form of expression, such as judging something by using two diametrically opposed expressions of right or wrong, clear and unambiguous. How can you use this simplest form to convey complex information?

Ruan Jingtian carefully recalled all the courses he studied in Manguo, which courses or knowledge might be related to this?