Daming: Grandpa Emperor, please get up and sit on my throne!

What on earth can be achieved by taking off pants and farting?

As time passed, the coal was finally dried.

Many miners subconsciously looked at Wu Yongliang.

Wait and see what outrageous thing he will do next.

"Everyone wait here. You come with me with this part of coal." Wu Yongliang did not act immediately, but ordered one of his trusted centurions to take the coal and leave with him.

He did not forget Song Zhong's instructions. This matter must be carried out in secret, especially people must not discover their intention of mining and coal washing. Now that it has come to the last step, they naturally have to avoid people.

The two were in tandem.

Soon they arrived at an empty and deserted place.

"Let's try burning these coals." Wu Yongliang looked around and gave a serious instruction to the captain who followed him.

"Yes, sir." Although the captain did not understand what he meant, he immediately took an appropriate amount of coal, did as he was told, and lit it.

Soon, the ignited coal was burning red and formed a ball of charcoal fire.

The captain next to him was still frowning and muttering in confusion: "Coal will catch fire if it is burned. It can be lit again after being soaked in water, dried and lit. Sir, what are you doing?" There were only two of them here, so they spoke casually.

And when the centurion looked up at his leader.

But Wu Yongliang's face was slightly red, and he stared at the charcoal fire in front of him with wide eyes, looking incredulous.

"Sir, what's wrong with you?" The captain looked at Wu Yongliang in confusion.

Wu Yongliang took a deep breath to calm himself down, then asked in a trembling voice, "Look at this charcoal fire. Is there any smoke?"

The captain took a look and shook his head: "No."

Wu Yongliang said: "Yes! No cigarettes!"

Then he said impatiently, "Go! Have the miners continue washing the coal! Dig more pits, find more people! Also, send an express delivery over 800 miles! Deliver my letter and the coal to Commander Song in Yingtian Prefecture!"

"Uh... yes." The captain was made even more confused by his direct superior's abnormal behavior. He responded blankly and turned to head towards the waterfall.

He took two steps before suddenly stopping.

He suddenly realized, "Coal that doesn't produce smoke when burned! Coal that can be used just by washing it in water after digging it out of the mountains!??"

He realized it belatedly and widened his eyes, his face full of disbelief.

The rocks from the mountains cost nothing! Hiring miners might cost a bit, but it's not a big expense...

In this way, we got an endless supply of anthracite!

"Not a single word of this matter is allowed to be leaked! Otherwise, the whole family will be executed! Remember? Just tell the miners to continue digging and washing coal, and then dry the washed coal until it is half dry. Do you understand?" Wu Yongliang warned in a stern voice.

"Yes, I understand!" The captain swallowed and responded.

……

The post riders passed from one post station to another like shooting stars.

We set out from Xianyang at dawn and reached the top of Longshan Mountain at dusk.

Although transportation conditions were very underdeveloped in ancient times, the transmission of important matters of the court was not the case. With the express delivery of 800 miles, it only took two or three days to travel from Shanxi to Yingtian Prefecture.

Qianqing Palace.

Zhu Yunhuan had just finished reviewing the memorials piled up on the dragon desk.

He casually threw the cinnabar pen in his hand onto the table, stood up, stretched, and yawned.

Ma Sanbao, who was waiting nearby, immediately took two steps forward.

She pulled out a few pieces of "glass" from her sleeves, placed them respectfully on the dragon desk, and said softly: "Your Majesty, these past few days, I have followed your instructions and used the magical 'convex lens' you ground to make molds... I used the molds to make colored glass, then polished them, and now I have these 'convex lenses'. Do you think they are good enough?"

Ma Sanbao was the only person Zhu Yunhuan trusted the most.

Zhu Yunhuan was very busy with affairs of state, so things like burning glass were naturally handed over to Ma Sanbao, and Ma Sanbao was now quite adept at it.

Zhu Yunhuan raised his eyebrows.

He glanced at the several convex lenses on the table with great interest, then picked them up and examined them one by one, nodding with satisfaction: "After the other parts are built, a simple microscope should be ready."

Thinking of this, a faint smile appeared on the corner of his mouth.

Given Zhu Su's seriousness in medicine, he believed that as long as he introduced the concept of microscopic knowledge to him and mentioned the things in his memory, his fifth uncle would surely be able to create quite a surprise.

"Summon Qin Kui to me." Zhu Yunhuan said casually.

"Yes, Your Majesty." Ma Sanbao responded.

But at this moment, an anxious voice came from outside the Qianqing Palace: "Eight hundred miles of urgent courier, let me in to see His Majesty!"

Zhu Yunhuan naturally recognized that this was Song Zhong's voice.

The 800-li express delivery was either a battle report or a privilege granted by Zhu Yunhuan as an emperor. Even if it arrived at the Qianqing Palace, it could save many complicated notification procedures. So within two breaths of Song Zhong's voice, his figure appeared in the Qianqing Palace.

Ma Sanbao reacted quickly. When he heard Song Zhong's voice, he quickly covered up several convex lenses on the dragon desk.

"See Your Majesty!"

"Your Majesty, express delivery over eight hundred miles!"

"From Shanxi! Happy event!"

Song Zhong knelt down to pay his respects, with an excited and excited smile on his face. In his hand he held not only an urgent package, but also a medium-sized brocade box in his arms.

Zhu Yunhuan raised his eyebrows, a hint of surprise on his face: "Shanxi...anthracite has been washed out?"

As the days go by, winter is getting closer.

Anthracite was naturally one of Zhu Yunhuan's biggest concerns.

"Congratulations, Your Majesty! That's right! The box contains a portion of anthracite. I brought it here specially for Your Majesty to see." Song Zhong said excitedly.

Then, a look of shame appeared on his face, and he apologized, "I am guilty! As a close minister to Your Majesty, I did not understand Your Majesty's intentions. When Your Majesty was thinking about the people, I even rashly questioned Your Majesty. I deserve death!"