"Recently, I began to study Master Huiyun's high theory, he is not only an all-round master, but also a monk with great wisdom, Zen philosophy pays attention to pure cultivation and epiphany, but it is very suitable for my current state of mind......

"Although I have never seen Venerable Huiyun's face, but whenever I am upset, thanks to his Zen explanations, he is a real master, I don't believe in any gods and Buddhas at all, and he has taught me a lot of life principles that inspire me a lot. In addition, he is a worthy of admiration, at the juncture of the Japanese invaders, the monks are afraid to avoid it, but he stands up and calls for patriotism to save the country, one day, I am willing to go somewhere else, copy the scriptures for him, and also talk about admiration......"

"I could die like this, but I can't die like this, I still have a lot of important things to do. I can't leave my wife, Biwan, and I want to meet old friends, I miss them so much. ”

"A friend brought back a fun thing for me from Moscow, which was a wartime code box, and when the war with Nazi Germany began, the intelligence officers sent by Moscow used this thing to save some secret things, which was very convenient. If I die, I'll put my suicide note in this password box. ”

Writing here, between Li Qingfeng's words, he has gradually revealed "escapism", and finally there is a bit of "misanthropy", probably related to his long-term drug injection, and what he said about "meeting old friends" should be to go to Tianjin to meet Zhuo Shaoqing and Professor Zhu.

The whole diary, from the warmth at the beginning, gradually became colder, and finally it was obvious that Li Qingfeng was in a predicament, Li Wutong couldn't bear to read it anymore, and pulled Wu Tongguang's sleeve.

Wu Tongguang understood what she meant, he "snapped" closed the diary and took out the brief score of "Guiyan".

The password numbers and the mother book left by Li Qingfeng were finally in his hands, and the mystery was about to be revealed. Li Wutong and the others seemed to hold their breath, the ward suddenly fell silent, and Li Qingfeng seemed to be singing this song in the air: "It's better to go back to your hometown and return to the ...... mountain"

Wu Tongguang thought to himself: "According to the previous reasoning, the notes in the brief score of "Guiyan" are actually numbers. ”

He recited silently in his heart, and read the notes in the note silently, the two sections of the short score of "Guiyan" have a total of 28 sections, each section has a number of notes, and the do in the note represents 1,

e for 2, mi for 3, and so on, to get this pure numeric arrangement:

“1231，4650，1653，232，

1231，4650，1653，21231，

150150，150150，1653，21231，

1217，6150，4652，3450，

1217，6150，4231，721，

1231，4650，1653，21231，

150150，150150，1653，21231。 ”

"That's right!" He felt a wave of ecstasy in his heart, this is the numeric cipher, and this is the most common cryptographic method of using 3 to 5 digits to find Chinese characters in the mother copy.

For example, the four-digit array 1231 refers to the first Chinese character in the third column on the second page of the first section; For example, the five-digit 21231 refers to the thirty-first Chinese character in the second column of the first page of the second section; For example, 721 in three digits refers to the first character in the second column on page 7 of the chapter with the same number as the previous set of numbers.

In order to make the number string more hidden, in the process of using numeric passwords, 0 is sometimes used, which means more than ten digits or empty characters. If it is in the majority of digits, it corresponds to ten or hundreds, and if it is at the end of the array, it means skipping the section, for example, 6150, and 0 at the end of the digit, it means that the whole 6150 does not represent Chinese characters.

Wu Tongguang's brain is flying, and the arrangement after eliminating the empty character 0 is:

“1231，1653，232，

1231，1653，21231，

1653，21231，1217，

4652，1217，4231，

721，1231，1653，

21231，1653，23231。 ”

Wu Tongguang flipped through the mother copy of the code, Li Qingfeng's diary, and quickly translated the corresponding Chinese characters in his mind:

"Forward counts, forward smoke turns into fire, and looks forward for smoke and smoke."

"What is this?"

What was translated turned out was a string of meaningless Chinese characters, that is, garbled characters. "What went wrong?" Wu Tongguang suddenly became nervous, and a bead of sweat oozed from his forehead.

Seeing him so concentrated, Li Wutong knew that it must have been the critical moment to crack the code, so she didn't dare to disturb and watched him silently.

"What the hell is this 'fire-seeking' comrade doing?" Wu Tongguang thought silently in his heart. As soon as the word "fire" was mentioned, he suddenly found that there were exactly two words "fire" in this string of garbled codes, so the password and the parent book could not be wrong, but the translation method was wrong.

Before Wu Tongguang assumed the pseudonym Zhou Zhengke, when he was lurking in Tianjin Station, he intercepted the CCP traitor to the stationmaster Xiao Guodong's exclusive ciphertext, this exclusive ciphertext encryption method uses the method of displacing the numbers, deliberately scrambling the original numbers, such as replacing 7 with 3, 2 to replace 8, in short, the two numbers add up to 10, before deciphering the password, the numbers must be restored first, only when the numbers are restored, it is possible to compare Chinese characters.

At that time, Wu Tongguang rushed back to the office after Yuan Yixiao returned to the office under the urgency of the situation, quickly broke through the encryption method of Stationmaster Xiao, and learned the important information transmitted by the traitor Dong Cheng.

This time, Li Qingfeng went around such a big circle, from the blank book to Huiyun's former residence, from transcribing the poetry collection to the brief score of "Guiyan", and even hid the diary and password separately, it stands to reason that now the mother book and password have been merged together, and there should be no problem with decryption, so it is obvious that this is the use of an exclusive arrangement.

What kind of decryption method?

The standing pendulum clock in the corridor outside the ward was ticking, and the whole hospital was quiet, and Wu Tongguang also fell into deep meditation.

"By the way, isn't there one thing missing?" Wu Tongguang said to himself. He suddenly thought that since Li Qingfeng was a high-level spy lurking in the top echelons of the enemy army looking for the enemy to break into our army, then what he passed on should be a list of spies, and now the garbled characters translated are only 18 Chinese characters at best, how can it be a list?

"If it's not a list, then what is it?"

He looked at Li Wutong, the two of them have gone through twists and turns in the past three days, thinking that they can deduce the notes from the poems, deduce the numbers from the notes, and find the corresponding Chinese characters from the numbers, so as to successfully crack the password, but I didn't expect that there is a very high probability that there is still a layer of this password, which is a veritable "multiple riddle in a mystery"!

Wu Tongguang sighed and said, "Fortunately, we seem to have opened the front several iron gates and stood at the door of the last iron gate. ”

Li Wutong had already regained the strength to speak, and said slowly: "Don't worry, since 'Xunhuo' and 'Lei Yin' are partners, will it be a special encryption method agreed between the two of them." ”

This sentence suddenly made Wu Tongguang's mind flash of inspiration, and he found that he had overlooked a very, very important question, which was fatal.