The Autumn Seed Heaven Worshipping Ceremony finally came to an end when the sun set in the west.
When Li Shimin and the others returned to Taiji Palace, it was already time to light the lanterns.
After they bathed and changed their clothes.
Li Shimin summoned Li Chengqian, who was about to take the opportunity to sneak out.
Li Shimin looked at Li Chengqian for a long time. When Li Chengqian was about to collapse, Li Shimin said faintly, "I know what you think and your personality. Do you know why I let you learn from Zhang Feng?"
"Your son knows!"
Li Shimin smiled and said, "Then tell me."
Li Chengqian didn't know what Li Shimin was thinking. Ever since he followed Zhang Feng, Li Shimin rarely talked to Li Chengqian.
After all, how could Li Shimin not know Li Chengqian's cunning mind?
He was timid, suspicious, and more importantly, indecisive.
He could see these from Li Chengqian since he was young.
Li Shimin had his own plans as to why he only said it now.
Looking at Li Chengqian, Li Shimin patted the soft couch beside him and said, "It seems that we father and son have not had a serious talk for almost a year, right?"
Hearing this, Li Chengqian hurriedly sat beside Li Shimin obediently.
However, Li Shimin looked at Li Chengqian's actions and couldn't help but sigh in his heart.
"You have indeed learned some skills during this time, but what I want you to learn the most is Zhang Feng's confidence in controlling everything, as well as his way of dealing with things without being alarmed. However, in this year …"
"Sigh! Tell me, what is the use of this mask, and what is the phosphate fertilizer you guys tinkered with? "
Li Shimin couldn't bear to continue speaking.
After all, if he spoke too harshly, Li Chengqian's suspicion would increase. If he spoke too lightly, it wouldn't be good. In any case, Li Shimin felt a headache whenever he looked at Li Chengqian.
None of them were free and easy like a man.
In the end, Li Shimin could only change the topic. However, Li Chengqian did not think this way. He thought that his father was very dissatisfied with his actions during this period of time and began to worry deeply.
Li Shimin patted Li Chengqian's shoulder and said, "We are very satisfied with what you have done during this period of time. Learn more from Zhang Feng about how to deal with people, as well as his attitude. This will always be good for you."
After talking with Li Chengqian for half a day, Li Shimin also lost the desire to continue the conversation due to the deep worry emitted by Li Chengqian.
He waved his hand and said, "What's going on with this mask? Also, what about the phosphate fertilizer? Can it be used in the autumn planting? "
Seeing Li Shimin change the topic, Li Chengqian also heaved a sigh of relief.
"Replying to father, this mask is the key to solving phosphorus poisoning. This son and others have been using this thing during this period of time. The effect is very magical. Originally, this son planned to give this thing to father when I got it last time, but on the way, I happened to meet Imperial Doctor Zhou who came to check my pulse."
"Then this son prepared to give it to Imperial Doctor Zhou first and let him use it in his daily diagnosis."
When Li Shimin heard this, his eyes couldn't help but light up, "This method is indeed possible. Then what happened next? We know that the cicada is extremely rare. How did you deal with this matter? "
"Use white paper!"
Li Chengqian saw Li Shimin finally show a rare smile. He didn't know that just now, Li Shimin already knew about this. He said what Zhang Feng said about using multiple layers of thin white paper to replace the cicada.
Li Shimin couldn't help but widen his eyes.
"In that case, this mask has basically become popular in Chang 'an City now?"
Li Chengqian shook his head and said, "Replying to Father, this matter has not yet become widespread. For the time being, most of the doctors in Chang 'an City have been put to use. Furthermore, I have also found a few talented people from White Deer Academy to impart the most basic knowledge of physiology and hygiene to these doctors. Even the Imperial Hospital has already taken physiological and health knowledge as a course. "
"Really?"
Li Shimin's eyes lit up.
He really didn't expect it to be like this.
Li Chengqian nodded. "Indeed, and as long as the doctors have used it and learned physiological and health knowledge, they basically used it in their daily diagnosis during this period of time. The effect is naturally very good."
"Moreover, this son has already printed hundreds of copies of the medical and health knowledge manual set up by Fengzi. The price of each copy is basically a hundred taels of silver!"
Li Shimin's blood boiled when he heard this.
This thing was really a good thing.
He had seen that thing before, and he saw Zhang Feng use it on Niu Jianhu's leg with his own eyes. He also wanted to use such a magical thing in the entire Tang Dynasty, but he didn't know how to say it. However, he didn't expect the Crown Prince to be one step ahead of him and think of it.
This also seemed to be a kind of progress, right?
Li Shimin nodded and said, "Not bad. Qian 'er has made a lot of progress to be able to think of this step. I am very happy!"
"Quickly tell me about the phosphor fertilizer!"
"Yes!"
Li Chengqian hadn't received Li Shimin's approval for a long time. At this time, hearing his father's praise, he couldn't help but feel a little smug. He excitedly told the whole story in full detail.
Li Shimin's eyebrows didn't relax as he listened.
After Li Chengqian finished, Li Shimin almost wanted to go and see Zhang Feng's masterpiece and that magical thing on the spot.
"It seems that this son hasn't seen this kind of new thing for a long time!"
"Go up the mountain with me tomorrow!"
Hearing this, Li Chengqian hurriedly said, "Father, Fengzi is now at Chang 'an University."
"Hahaha, do you think Fengzi is so easy to fool? Believe it or not, this kid must be on the mountain right now! "
"…"
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