After taking a closer look at Liu Yun, Lao Jiang asked in surprise, "Yicheng, are you a North American intelligence officer, and you are an old acquaintance with the Situ family of the Zhi Guild."

"North America, intelligence officer", Liu Yun was immediately stunned.

Seeing Liu Yun's blank face, Lao Jiang gave a slight explanation, because most foreigners have a headache for learning Chinese, and they are even more painful about classical Chinese poetry, so Nanjing's intelligence department deliberately used classical poetry as a joint code for overseas intelligence officers.

As for the three mysteries of "endless Yangtze River rolling", "Chen" and "Japan", it is not the identity authentication of intelligence personnel, but the degree of confidentiality of the intelligence they carry.

"Not all the Yangtze River" means that there is important intelligence, "Chen" means confidential information, "Japan" means top secret information, in fact, there is still a super intelligence mystery, but Lao Jiang didn't say it again.

Liu Yun was also in a cold sweat, no wonder when he attacked on a rainy night, he said "The Yangtze River is not endless, Chen", after the gray-clothed man hesitated, it turned out that the degree of confidentiality was not enough, if he was smart enough to answer "day", if he didn't make a fool of himself, the other party would be desperate to poison him.

There was no need to hide it from Lao Jiang, Liu Yun chased Tada Jinzo for thousands of miles to kill Zhongcheng Gong Qingzi, asking for some information, and when he first arrived in Nanjing, there was a gray-clothed man in the rainy night, and he also wanted to ask for any information.

When he heard that the man in gray secretly poisoned him, Lao Jiang's face couldn't help but darken, and he was suddenly furious, "Niang Xipi, it's so lawless, you dare to kill people at the Army University in Nanjing, it's really arrogant, you must wear a hat to find out."

Liu Yun suddenly remembered something, when Lao Jiang first arrived at Lu University, there were more than a dozen generals with him, one of whom was a little familiar, and couldn't help but move in his heart, and hurriedly called the wisdom brain to check, and sure enough, one by one, it was the man in gray, and he hurriedly said to the commission.

"Headmaster, the memory of the students has been stronger than ordinary people since childhood, if I am not mistaken today, the man in gray has appeared, among the generals who came with the headmaster."

According to the characteristics and evidence provided by Liu Yun, Lao Jiang quickly found out the traitor, it was Liu Tingxu, the deputy director of the General Staff Headquarters of the Nanjing Military Commission, the deputy director of the War Department, Lao Jiang was unbelievable, this guy graduated from the Army University, and was still a student in the special class (1928-1931, Beiping).

Major General Liu was Lao Jiang's confidant and favorite general, successively served as the commander of the Second Army, the director of the Hanyang Arsenal and the commander of the independent brigade.

The staff headquarters is close to the Army University, Liu Tingxu has extremely convenient access, even if he kills people at night, he can't find his head, this guy is naturally unscrupulous, this time he accompanied Lao Jiang to review, it was also an accident, I didn't want Skynet to be restored and not leaked, and I was caught by Liu Yun.

Lao Jiang was also drenched in cold sweat, and the staff headquarters was full-time to draw up military plans, which were all spies of Japanese spies, and they were able to pay back during the Sino-Japanese war.

Lao Jiang originally wanted to ask what Dr. Liu's plans were for the future, but now he was in no mood, so he waved his hand depressedly and asked someone to leave on his own.

Liu Yun also took advantage of the situation to retreat, just walked to the door, and was about to close the door, Lao Jiang suddenly said faintly, "Yicheng, you help the Red Party buy arms, just stop it, don't take it as an example, you have to do it yourself, I don't want to shoot my students by myself one day."

Liu Yun's body suddenly stiffened, a cold air penetrated deep into the bone marrow, and only after half a sound did he say, "Principal, the student knows", and then left in a hurry, with a sigh behind him.

When Liu Yun returned to the guest house, he saw that there were people in and out, all of whom were busy moving things, some were just a backpack, some were toiletries, and a lot of books.

The most bizarre thing is to move furniture, large and small piles into a hill, there is no more shipping to buy again, and after a group of returnees are busy, Liu Yun found that the entire guest house, there is only one left, Zhang Boyu needless to say, went to Xuanwu Lake to see his cousin, and Yang Kai also went most of the time.

When Liu Yun was in a daze, a guy in military uniform came to pass the word, saying that there was a small car parked at the door, which was specially to pick him up and leave, and thought that Zhang Yang's conscience had found out, so he ran out happily and saw a familiar figure, Pang Yuyan.

Meeting in a foreign country is one of the three joys, the accident is an accident, Liu Yun is still very happy, but Pang Yuyan is also very happy, but found that she is also wearing a military uniform, but after a closer look, she found that the military uniform is not wearing a military rank or the like, and the style is a medical soldier style.

After the two exchanged pleasantries, Liu Yun knew the original reason, it turned out that Pang Yuyan's father and daughter arrived in Nanjing yesterday, worried that it would affect the normal military training, so they did not notify him immediately, and today Pang Taishi had something to do, so she was asked to drive to pick her up and go to the Liu Mansion at Xiaguan Wharf in Nanjing to live temporarily.

At this time, Liu Yun also remembered that when he left Shanghai, Pang Taishi seemed to have said that as soon as his military training was over, everyone would return to Sichuan together, but he was really a believer.

Soon after Liu Yun got in the car, he was talking about interesting things about military training with Pang Yuyan, only to find that the car was not going to Xiaguan, but to the direction of Xuanwu Lake.

Everyone hasn't seen each other for a long time, and there are endless words along the way, Pang Yuyan proudly told Liu Yun that she went to the Shanghai Army Hospital before and interned for a month, if it weren't for Pang Taishi's repeated urging, she might have joined the army, well, the hospital is ready to give her the rank of captain directly.

Seeing the proud Pang Yuyan, Liu Yun was overjoyed, hum, what is a captain, my brother is a lieutenant colonel, and he is also a protégé of the Son of Heaven who is also a member of the Jiang Commission, if you know, you will not be envious, jealous and hateful, this guy completely ignores the difference between reserve and active duty.

As the destination got closer and closer, Liu Yun became more and more familiar with the surrounding environment, and secretly said in his heart that this big man was the God of Kong Cai, and as expected, the car stopped in front of Kong's villa.

To Liu Yun's surprise, it was Kong Yuling who greeted him personally, and he and Pang Yuyan were also old acquaintances, and as soon as they met, they chattered and talked and threw Lieutenant Colonel Liu aside, and he guessed wrong, Zhang Boyu and Yang Kai were not there at all, and under the guidance of the servants, he went straight to see Master Pang and Kong Caishen.

On the lawn of the villa, he saw Pang Xuezhong and Kong Xiangxi, but what surprised him even more was that he also saw a German general, it was General Alexander von Falkenhausen.

Originally, Liu Yun was wondering why he didn't see Lao Jiang during the review, because General von Seekert was in poor health, and most of the affairs of the German advisory group were handled by Falkenhausen, and he would officially take over the post of general adviser next year, so he often followed Lao Jiang and attended various activities.

To everyone's surprise, when Kong Caishen was about to introduce von Falkenhausen to Dr. Liu, the German general had stretched out his big hand and shook hands with Liu Yun with a smile.

"You're that, that great military genius, aren't you," said General von Falkenhausen, probably so excited that he unconsciously used German.

"Yes, General", relying on the simultaneous translation of Zhi Brain, Liu Yun also replied in German, "I don't know what the general thinks of my thesis and its mechanical design."

Both of them rolled their eyes, they both spoke in German, and they were like ornaments.

"I, for a long time, have heard that yours is very good in German", von Falkenhausen is a German aristocrat, throwing his former friends aside, he was too uneducated, and hurriedly changed to Huaxia and communicated with Liu Yun, "Today, when I saw it, sure enough, it was not famous."

Well, so everyone automatically filtered and corrected it to "worthy of the name", so that an authentic German said that the Chinese idiom is more difficult, in the past, like this kind of communication occasions, von Falkenhausen will bring his own translation, today may be out too in a hurry, forgot to bring.

Only the parties concerned know that today's conversation is more confidential, and the fewer participants the better, von Falkenhausen can speak Chinese, and Liu Yun is proficient in German, so he doesn't need a translator, and the two of them communicate directly in German when necessary, and even Pang Kong and the others can be excluded.

"This is, the admission notice of the Berlin Military Academy", von Falkenhausen looked cautious and handed it to Liu Yun with both hands, "When you return from your studies, you will definitely become a marshal."

The two of them were completely convinced, who said that the Germans were rigid and would not be able to socialize.

Out of politeness, Liu Yun accepted the admission notice, but the ugly words were said in front, so he apologized very tactfully, "Your Excellency General, I am a doctor of mechanical science from the University of California, and I will be busy with the construction of the motherland in the future, and I am afraid that I will not have time to go to Berlin for further study, so please understand."

Von Falkenhausen didn't care about this matter, and didn't even have the slightest sense of blame, but as if he had taken a reassuring pill, he waved his hand, "No problem, your "Homeland Defense" is very good, General von Seekert admired it after reading it, and originally planned to come to see you in person."

The German general shrugged his shoulders and apologized helplessly, "His health is really bad, so he has to send me to talk, you won't mind too much."

Master Pang and Kong Caishen looked at each other, as if to ask if we heard correctly.

Everyone is just trading, whoever comes is the same, Liu Yun also shrugged his shoulders and said with a smile, "Of course, Your Excellency General, I hope the cooperation is pleasant."

Von Falkenhausen went straight to the point, "I, with General von Seckert, think that your foresight and assumptions are reasonable, and send a telegram to Berlin, which wants us to get the design drawings, preferably in kind, and we will do whatever it takes."

After speaking, Falkenhausen looked at Liu Yun nervously, this old god was there, the tea was sizzling, and he turned a blind eye to it, and the Germans had no choice but to ask Pang Kong and the others for help.

Kong Caishen and Pang Taishi also understood, it was the Germans who asked Liu Yun for a request, as if it was a design drawing, for their questions, Liu Yun did not explain, only hinted to them to discuss in detail afterwards, these two people immediately understood, looked at the nose and nose, and also concentrated on drinking tea.