In the next week, Zhang Hao will come to the Tibetan Pavilion every night to find the books he needs, to be honest, at night, he came to a deserted cave, which is really a bit infiltrating, but fortunately, he has a bone spirit, and he can be a companion, and he is much more practical.

Half a year ago, Zhang Haotian learned the secret of the Zhang family in the Unyielding Valley at the Beast Spirit Tower Conference, and if he wanted to use this secret to blackmail someone, he had to ensure that the letter he used to threaten would not pass through the hands of any other person, and would be directly and accurately delivered to the person who sent it, without his family knowing.

When he was in Zhang's house before, Zhang Haotian had accidentally heard that there was such a method of sending letters, but he didn't know how to do it. If it is a Tibetan pavilion, there may be a book that records this method.

However, there are so many books in the Tibetan Pavilion that even if Zhang Haotian targets the books related to letters, it will take a lot of effort.

"You've been looking for it for six days, aren't you alright?" the bone spirit grumbled.

Zhang Haotian is also very helpless, reading too quickly for fear of missing it, but there are a lot of books to be inspected, looking at the number of books left to be inspected, people can't help but feel a little helpless.

"Do you think I want to? Yesterday, my guidance teacher was changed to Teacher Lezheng, but I still haven't found a way to send the letter, so I can't move on to the next step. Zhang Haotian gritted his teeth and continued to flip through the book in his hand without glancing at Gu Ling.

"What exactly do you want to do?" Gu Ling asked curiously, he didn't know what Zhang Haotian wanted to do for so long.

"Just find what you want. Zhang Haotian didn't say it bluntly, in a place like the Tibetan Pavilion, the sect naturally laid a lot of talisman arrays, and even if Zhang Haotian found what he wanted, he had to pretend not to see it, just to avoid Li Xijian from doubting his actions.

Zhang Haotian turned to the last page of the book in his hand, didn't see what he wanted, closed the book, and put it back in its place: "Let's stop here tonight, it's late, let's go back first." ”

"I can finally go back. The bone spirit, who had been sitting on the ground, stretched his waist, stood up, and left the Tibetan Pavilion after following Zhang Haotian's buttocks.

During the cleaning period, there were many patrolling colleagues along the way, and the night road back was not as gloomy as before.

The lights in the Cuizhu Pavilion were still on, and Zhang Haotian thought that Wang Zhao hadn't slept yet, which was strange. Didn't he go to bed early at times like this before?

Zhang Haotian tiptoed into the room, only to find that Wang Zhao fell asleep directly on the edge of the table, what was he doing?

Zhang Haotian walked in and took a look, Wang Zhao seemed to be writing something in front of the table before, speaking of which, Wang Zhao had always had the habit of writing a diary a long time ago, but they had never done such a thing as peeking at Wang Zhao's diary.

But this time the diary was directly exposed in front of Zhang Haotian's eyes, and it was difficult for Zhang Haotian not to let his eyes drift to it, especially after seeing the sentence "I also want to help my uncle", Zhang Haotian instantly felt like he had found a companion.

Yes, although Wang Zhao has no blood relationship with Zhang Shui, after all, he was raised by Zhang Shui since he was a child, and his previous family relationship with Zhang Shui is deeper than blood.

Thinking of this, Zhang Haotian secretly looked at the rest of the diary, and sure enough, Wang Zhao was also confused because he wanted to help the teacher and couldn't help. Do you usually care too much about yourself and ignore the thoughts of others, thinking of this, Zhang Haotian thought of the betrayal of Xu Zifeng.

Zhang Hao shook his head vigorously, sobered up for a moment, stretched out his hand and shook Wang Zhao a few times: "Wang Zhao, wake up, Wang Zhao." ”

"Huh?" Wang Zhao woke up sleepy-eyed, still confused, "What's the matter? Who called me, do you want to repair early?"

"It's still the middle of the night, wake up first. Wang Zhao. Zhang Haotian stretched out his hand and waved a few times in front of Wang Zhao.

"Haotian, what are you doing waking me up?ah, why am I here?ah, I just fell asleep while writing. Wang Zhao slapped his head a few times.

"I'm not telling you this, I accidentally saw your diary, I'm sorry first, but our goal is the same, Wang Zhao. Zhang Haotian said excitedly.

Wang Zhao was still confused when he heard this: "What?"

Zhang Haotian was about to explain, but he stopped talking, first used the dragon rune to cast the dragon vision spirit, and confirmed that there were no traces of the runes around, and no one else was eavesdropping.

Zhang Haotian spoke to Wang Zhao with confidence, but still lowered his voice: "Don't you also want to help the teacher?" But the teacher couldn't have agreed to the two of us going over to help him. ”

"Do you mean the destruction of blood demons?"

"You know the Blood Demon?"

Wang Zhao nodded: "I accidentally heard something, although I am still only a blue-level talisman, but I also want to help my uncle and him, but my uncle will not agree to our intervention at all." ”

"Then let's sneak in and help them. Zhang Haotian smiled, and Wang Zhao looked up at Zhang Haotian in surprise.

"How?" Wang Zhao seemed to be interested in Zhang Haotian's thoughts.

"Starting from the Valley of Indomitable, I learned some of their secrets from the Tree of Knowledge, and I can contact one of them privately and use him through this secret. But I now need a means of communication that can reach that person without alerting the rest of his family, and no one will find out the contents of the letter. Zhang Haotian said what he needs now.

"Is there really such a way of communication?" Wang Zhao wondered.

Zhang Haotian replied firmly: "Yes, I once heard from my family that it seems to be a special post station that provides this kind of secret correspondence service. However, I don't know the exact details, and I tried to find any books in the Tibetan Pavilion to see if there was such a record, but there were too many books. ”

"Do you want me to ask Su Lao?" Wang Zhao immediately understood what Zhang Haotian meant.

Zhang Haotian nodded heavily, he was very satisfied with Wang Zhao's comprehension, he didn't expect that the cooperation with Wang Zhao would be so instantaneous.

"It has to be you who write a letter, my intention to participate in the extermination of the blood demon was too strong before, Teacher Li was asked by the teacher, and the supervision of me will definitely be strengthened, but if you send it, it will definitely be possible. ”

Wang Zhao suddenly raised the corners of his mouth: "We can be more secure, after all, I am also a relational of my uncle." ”

"Do you have any other good ideas?" Zhang Haotian didn't understand for the time being.

Wang Zhao smiled mysteriously: "Haotian, you just wait for the good news." ”

Wang Zhao sold Zhang Haotian a pass here, although it was not clear what Wang Zhao was going to do, but Zhang Haotian knew that he now had a reliable ally.

From a certain point of view, they are both Zhang Shui's nephews, and it may be fate to join forces at this moment.

Perhaps in order not to suspect Wang Zhao, Zhang Haotian still visited the Tibetan Pavilion during the time he applied to read it, and inspected the clues in the book.

Then there is such a glimmer of possibility, Zhang Haotian also hopes that he can find it.

However, until Wang Zhao got Su Lao's reply, Zhang Haotian couldn't finish reading the book he wanted to read, nor did he find the method he had been looking for.

That night, Zhang Haotian originally wanted to come out of the Wanjuan Hall and go to the Tibetan Pavilion as usual, but he didn't expect to be blocked by Wang Zhao at the exit as soon as he came out of the Wanjuan Hall.

"Wang Zhao, what's wrong?" Zhang Haotian reacted immediately, and his mouth grew with excitement, but fortunately he couldn't help but shout, "Let's go back and see." ”

Wang Zhao smiled and gave Zhang Haotian a thumbs up, and the bone spirit on the side looked at the two of them, and didn't want to say a word about them. Just silently followed behind the two of them and returned to the Cuizhu Pavilion.

As soon as he returned to the Cuizhu Pavilion, Zhang Haotian used his dragon vision to determine the surrounding situation and ensure that there would be no possibility of leakage, and then he and Wang Zhao cautiously opened the letter.

Wang Zhao pulled out the letter paper from the envelope little by little, Zhang Haotian saw the Sanrui pattern printed on the paper at a glance, and when Wang Zhao completely took out the letter, after unfolding it in front of him, Zhang Haotian found that the content written on it had nothing to do with what they wanted, and it was completely a guide to Wang Zhao.

Zhang Haotian sat on the edge of the bed a little dejected, but Wang Zhao turned back to Zhang Haotian and smiled mysteriously: "What's the matter?"

"Of course, you don't have what you get, why do you look proud?" Zhang Haotian saw Wang Zhao's expression and understood that it was not so simple.

Wang Zhao explained to Zhang Haotian: "Even if I write a letter, there will be a risk of being monitored, since I want to do it, I should do it safely." I didn't see the pattern of this Sanrui flower. ”

Zhang Haotian nodded, how could he be so conspicuous that he could see it. Could it be that there is still some mystery hidden in this Sanrui pattern?

Zhang Haotian came over again with great interest, and even the bone spirit was attracted by Wang Zhao's traitor, and wanted to know what the mystery was.

Wang Zhao felt quite proud that he had attracted the strong interest of these two people, it seemed that his little trick was really good, even Zhang Haotian was also interested in it, and then Wang Zhao slowly told Zhang Haotian the truth.

"If the juice of the petals of the Sanrui flower is used for writing, there will be no traces of the words after drying, and in order to make the characters visible, they must be soaked in water and then dried over a hot fire. This method was known only to Su Lao, and it was a secret that he personally experimented with. Therefore, the only people who know this method are me and Su Lao, and no one will know my true content at all when I write letters with the juice of Sanrui flowers, and only when Su Lao sees the pattern of this Sanrui flower will know my true intentions.

And this reply letter also has a Sanrui pattern, which shows that Su Lao understood my intentions, saw the real content, and wrote the real content to me in the same way. In this way, it avoids the surveillance that Mr. Li may have left behind. ”

After listening to Wang Zhao's explanation, even Zhang Haotian had to admire Wang Zhao's move, but this kind of secrecy that only two people knew, it was not surprising that he didn't expect it.

"Without further ado, let's try to make the handwriting visible. ”

Zhang Haotian let the bone spirit hit a plate of water, Wang Zhao carefully immersed the letter in the water to prevent it from breaking, and then gently lifted it up, and glanced at Zhang Hao's angel, Zhang Haotian immediately cast the Adam's apple fire spell, the round fireball rose, and Wang Zhao put the letter paper close to the Adam's apple fire.

The Adam's apple fire is a round fireball with no tongue of fire jumping, so you don't have to worry about the fire grazing onto the paper. As the temperature of the Adam's apple fire slowly dried the water on the paper, Zhang Haotian saw that there were more traces of words in the original blank space of the letterhead, which was a little light, and it was a lilac like a Sanrui flower.

"Alright!" As the handwriting was fully revealed, Wang Zhao couldn't help but shout excitedly, and immediately covered his mouth and snickered.

The two of them carefully looked at what Su Lao wrote to them, which was the secret letter method that Zhang Haotian was looking for.

"The closest to you, the Netherworld Post of Suyun City, pick three red Yin Cao flowers and put them on the counter, naturally someone will take you to use the Three Shadows Messenger, the Three Shadows Messenger, do not collect bright crystals, only accept strange treasures. Remember, just send a letter, don't say much. ”

Su Laosan explained all the important items in a few sentences, Zhang Haotian just gasped when he saw the place name of Suyun City, but he didn't expect to have to go to the place where dragons and snakes are mixed.

"What's wrong? Wang Zhao looked at Zhang Haotian's reaction a little strangely.

"Cloud City isn't a good place, we need to plan it well. ”