Back in the cave, Tang Hao set about compiling teaching materials.

In this regard, he has sufficient experience. He has compiled many kinds of ancient books of medicine before. Now he has changed to Dandao, which is also familiar.

He took out all the classics of Dan Dao, reread them and sorted them out carefully. Then, he wrote down all his experience and understanding of learning Dan over the years, and then compiled a textbook.

This is a huge project. Tang Hao has collected an unknown number of Dandao classics over the years, at least millions of copies. It will take a lot of time to reread them all.

What's more, he has to tidy up.

Fortunately, he divided many souls, and if not enough, he directly cut another batch out. In his cave, thousands of souls were invested in this project together.

They took stacks of ancient books and baskets of jade slips and kept looking through them.

Some of these ancient books come from Qiyuan, Taixu, endless starry sky, and Pangu

What they see will all converge in Tang Hao's mind.

Every moment, there will be countless information pouring in. His head runs at high speed. He quickly browses the information and sorts it out again.

By rereading these Dan books, Tang Hao made some new discoveries and insights from time to time, and his mastery of Dan knowledge became more and more comprehensive.

Countless ancient alchemy, secret methods and prescriptions were sorted out by him and written into the teaching materials.

This batch of teaching materials can be described as an encyclopedia of Dandao, which integrates the great achievements of the development of Dandao over the past tens of thousands of years, runs through ancient and modern times and is all inclusive.

It can be said that there is no more comprehensive Dandao classics in the world. It is impossible for the major clans of Pangu to have, even for the thirty-three days, the oldest inheritance.

Tang Hao's textbook is absolutely unique in the world.

If there is a Dan master here at this moment, we must be shocked.

In the history of Dan, no one has ever made such a feat and compiled such a comprehensive ancient book of Dan.

This is definitely a feat of ancient and modern times. It is enough to be famous in history!

"These classics... Are not enough!"

Tang Hao is not satisfied. In his collection, there are still fewer Dan books in Pangu.

Since he has done it, naturally he should do his best. This is Tang Hao's habit.

He found fuyunzi, brought all the classics left by the Dan Road of fortune, studied them carefully, and compiled them into the teaching materials.

Soon, this set of all inclusive Dandao classics, which collected the strengths of all families, was finally born.

A set of twelve volumes with tens of millions of words. There are three volumes about plants and trees alone, one volume about medicine, one volume about medicine, and one volume about analytical pharmacology. The other nine volumes are about Dan. They collect millions of kinds of Dan in the world and introduce tens of thousands of Dan schools from ancient times to now.

All kinds of Dan Dao skills and secrets are included.

"Finally finished!"

When he finished writing the last volume, Tang Hao breathed a sigh of relief.

It takes too much effort to write such a set of great works. During this time, he worked hard and devoted all his efforts. With the help of tens of thousands of ways and souls, he just completed this huge project.

"Dao you! Congratulations!"

"Taoist friends, once this book is completed, it will shake the ages and go down in history!"

All the souls were jubilant and congratulated one after another.

In Tang Hao's heart, there is also a sense of pride. It's not his boast. His set of Dan books integrates what he has learned all his life, the strengths of thousands of families, and the Dan Dao of ancient and modern times.

In this world, there is no Dan Book comparable to his one.

As long as he spreads this Dan book, it will shake the Dan world and shine through the ages.

"This one is equivalent to an encyclopedia. It's very comprehensive. Let's call it Dandao encyclopedia." Tang Hao thought for a long time and finally decided on the name.

"This encyclopedia is not enough. Although it is comprehensive, it is not deep enough to improve the level of a Dan teacher in a short time. I also need some Dan books to write my own experience and skills."

Tang Hao pondered and continued to write.

This time, he focused on sorting out his experience and compiled various teaching materials, including those suitable for novices, for training primary Dan teachers and those suitable for advanced, covering various levels.

How was Dan made

Master Tang on Dan

"Secret script of Dandao! Introduction to three months"

Tang Hao gave full play to it with great speed. In only half a month, dozens of textbooks were born. He also turned over the textbooks compiled in Shennong Valley and compiled them again, which became a batch of new pharmacopoeia.

After being closed for a month and a half, Tang Hao finally got out of the customs.

When he came to fuyunzi with this pile of Dan books and put them in front of him, master Fuyun was stunned, and the tea cup in his hand crashed with a bang.

"This... This is all written by you?"

The floating cloud son stared round and stared blankly at the pile of high ancient books in front of him.

He knew for a long time that master Tang was writing a Dan book in seclusion, saying that he wanted to improve his level of creation Dan Dao. Before, he didn't believe it, thinking that this was just talking.

After all, writing Dan Shu is not a simple thing, which requires long-term accumulation. This is too young. Although his Dan skill is high, his accumulation is not up to the level of writing Dan Shu.

Even if it's made up, it's just an ordinary Dan book.

Moreover, only one and a half months, how many things can be made up.

But now, the small mountain high Dan book directly stunned him.

"With quantity, the quality must not be high!"

He soon calmed down and muttered.

Other masters write teaching materials for several years or even decades. Only in a month and a half can they write a good Dan book.

Thinking like this, he casually took one and looked at the cover, which was stunned.

"Dandao encyclopedia? Yo! It's not small!"

The floating cloud son smiles and doesn't care.

Then, he casually opened the Dan book and looked at it. The smile on his face was gradually solidified and more rigid.

"This... This..."

His eyes widened gradually, filled with an extremely unbelievable color.

"This... This is impossible?"

He was a little excited and flipped the Dan Book crazily, but the more he read it, the more incredible he was.

This volume introduces various genres, most of which he has never heard of.

"Yuding sect? When was it?"

"Tai Xu Dao? This... Isn't this the inheritance of the Dan Dao of Tai Xu Tian? Why is it here?"

He was more and more shocked.

After reading this book, he picked up another one to introduce plants. When he looked at it again, he was surprised. There were many plants in this book that he had never heard of.

"Impossible!"

He seemed to be stunned and rushed into the pile of Dan books. He looked through them one by one, and his mind was more and more shocked.