Chu Feng's strategy was greatly appreciated in the court, and there was an endless stream of people visiting the Taiyuan Palace.

The matter that Chu Feng did not come up with the strategy was suppressed by Chu Qi, after all, this is not a glorious thing, and besides, who came up with this strategy is not so important, whose mansion does not raise a few strategists, the key is that Chu Feng successfully took advantage of this to establish his authority and trust, and no one in the court dared to despise him because of his past experience.

As Qing Yu expected, after this document was handed to Chu Feng, the relationship between Chu Feng and their sister and brother became even closer.

They were inseparable all day long, talking about everything, and because the residence was only separated by a wall, it was extremely convenient to move around, and gradually, compared to Yu'er, Chu Feng relied more on the Phoenix Twins.

On this day, the sun was just right, the flowers in the imperial garden were blooming, and the Queen Mother of the West Palace was supported by the grandmothers to walk in the garden and bask in the sun. The last time the Immortal Gate Saint without a mirror ruin gave Xigong a look at his illness, Xigong's body improved a lot.

Princess Yu'er instructed the grandmothers that if it wasn't raining and cloudy, she would take the West Palace to sit outdoors every day, enjoy the flowers, drink tea and bask in the sun, and couldn't hold back in the house all day.

A few times, Xigong was tired, he didn't want to take the medicine too bitterly, and he didn't want to go out and walk around, so he lay lazily on the bed, and Yu'er, who was visited, said a few words, blaming her for not taking care of her body.

Seeing that Yu'er was angry, Xigong obediently obeyed, drank the medicine, and was pulled out to bask in the sun for an hour, and the older he was, the more childish he became.

The sun is just right, the garden is full of flowers, the breeze is gentle, and when he walks around every day, Xigong really feels a lot more comfortable.

Suddenly, there was a hearty laughter, and looking in the direction from which the voice came, a bright yellow shadow was seen in the distance, in this Dongchen Palace, only Chu Qi and Chu Feng could wear this bright yellow brocade clothes.

"Who should I be smiling so happily, it turned out to be Chu Feng, I haven't seen him for a long time, but I have thought about it. "Xigong Road.

"Isn't it, the eldest prince has been very busy these days. I heard that the eldest prince proposed a good policy for the benefit of the country and the people in the court a few days ago, which impressed the ministers, and even the emperor praised him. Seeing that Xigong was in a good mood, Mama Liu said with a smile.

It's just that as soon as these words fell, he saw two people behind Chu Feng from a distance, one of them was wearing a cyan brocade robe, and the other was wearing a plain dress, with a thin figure, white and clean, and slim.

Seeing that she seems to be the same age as Chu Feng, although she is not yet fully developed, she has a beautiful and shy attitude, standing by the lotus pond, the breeze is light, and she looks more and more delicate and lovely.

I saw Chu Feng pick a flower from the flower bed and hand it to the woman, and then he didn't know what to say, and picked another flower and inserted it in the bun next to the woman's ear, and there were bursts of laughter.

"Who is she?" Nishinomiya put away his smile, his face extremely ugly.

"This ...... This seems to be a proton sent by Muller. "Mama Liu is getting older, and her eyes are getting worse and worse.

"It's like? You're really getting more and more confused, don't you want me to send you out of the palace to retire? When did there be such a goblin around the eldest prince, you didn't even know at all. What are you doing to eat!" Nishinomiya was furious.

The maids who were waiting around knelt on the ground, trembling, admitting their mistakes and begging for mercy again and again.

"Check it for me, I want to see who gave her so much courage to seduce the prince at a young age, and who is supporting her behind her, give me a careful investigation, don't let go of any clues. Nishinomiya shouted fiercely.

The magnet arrived from the north, along with samples of various other ores.

Qisheng only knew that there were rich ore veins in the north, but he didn't know what they were, so he ordered the Salvation Society to collect ore samples and transport them back, in case he encountered any rare treasures.

The Seven Life Guards transported several large baskets of various ores to the backyard, and looking at the large and small piles of stones on the ground, Seven Lives had a little headache.

So called the medicine girl and Dong Xiang, the medicine girl was born in a medical family, and she knows a lot about pharmacology and medicinal properties, and these seemingly ordinary stones are likely to be good medicine.

The Medicine Girl didn't recognize any stone, she knew most of the ores with pharmacology.

Dong Xiang learned a lot of pharmacology from the medicine girl, but it was still not very convenient for the medicine girl to speak, so the complex pharmacology and medicinal properties were mostly Dong Xiang.

"This is saltpeter, which can dispel filth and purify turbidity, tackle tough problems and break accumulation, dilute water and purify solidification, detoxify and reduce swelling. ”

"This is stone sulfur, which is used internally to replenish fire and help yang laxative, and externally used for scabies, baldness, and pubic sores. ”

Qisheng listened a little listlessly, but he ......

"Wait, saltpeter, brimstone...... What are you talking about, but the rough stones of potassium nitrate and sulfur?" Qisheng asked, his expression incomprehensible, both surprised and delighted.

"What is potassium nitrate? All I know is that Master Tula told me a secret recipe before, which is to use saltpeter, sulfur, etc. to make a fire. The medicine girl said, after a few months, she can already speak and write simple words.

"Xinhuo, you're talking about fireworks?"

No, there were no fireworks in this era, but some killer organizations or military organizations, when performing tasks at night, would ignite a certain substance, fly into the sky, and flash in the night sky, mostly used as a signal, also known as "letter fire".

However, the production of "Xinhuo" needs to go through many processes, and the materials are exquisite, the value is expensive, and the configuration of the recipe is even more rare.

In fact, the "Shinhuo" itself is not difficult to make, but no one has yet researched the exact recipe, so many useless and extremely expensive materials are added for no reason, such as mercury, gold powder, butter, honey, and so on...... On the contrary, it affected the quality of the fire and the success rate of blasting.

Qisheng remembered that on the night of the Shenmu Festival, when he rescued those one-horns, Tula used the "letter fire", but at that time, Qisheng did not think carefully about what this letter fire was made of.

Qisheng looked excited, and his eyes were glowing as he looked at these stones.

The medicine girl looked at Qisheng a little puzzled, and muttered in her heart, but they are all common stones, why is Princess Yu'er so happy?

The reason why Qisheng was so excited was because she knew that as long as she matched saltpeter, sulfur, and charcoal in a ratio of 7.5 to 1 to 1.5, she could get the purest "black powder".

This is undoubtedly the most terrible weapon for the world, which is still in the age of cold weapons.

Even in the world where Qisheng was originally located, in the long history of thousands of years, this saltpeter and sulfur were mostly used as fireworks and firecrackers and the elixir of Taoist priests thirsting for immortality, concealing their true energy.

Returning to the house, Qisheng immediately wrote a book to Tula, ordering him to collect a large amount of saltpeter and sulfur in the shortest possible time, and let him build a house for experiments in a safe and hidden place, and she was to leave the palace.