In the courtyard, everyone gathered around the vat of water, not the vat of ice. Li Er looked at Lu Hanyang with a shocked face, and he had a strong shock in his heart: This immortal can live for two or three hundred years now, so ......

Thinking of this, Li Er was even more determined in his previous thoughts, although he was rejected by Lu Hanyang last time, but now he completely wants to tie Lu Hanyang, the immortal, to the chariot of the Tang Dynasty.

An immortal who can survive for hundreds of years, if the other party becomes the national teacher of Datang, then why can't Datang continue forever? You must know that what the other party said is that you can live for two or three hundred years now, and then resume cultivation in the future, who knows how long you can live?

So Li Er made up his mind in his heart, he wanted to find a bargaining chip that could keep this immortal in Datang all the time, but now he had no choice.

"Alright, Liz, let's get the stuff out!" Lu Hanyang was not in a daze, he directly asked Li Lizhi to take out the things hidden in his sleeve. A small tube is attached to a small pocket inside the sleeve.

Inside the pocket is saltpeter, and the saltpeter powder is passed out through a tube, and then the saltpeter is thrown into the water in the palm of the hand by covering it.

"This ...... Is it immortal magic that condenses water into ice? Li Er looked at the bag with a small bamboo tube that was taken out by Li Lizhen.

"That's right, this is what you want to condense into ice, to be honest, these things are very simple, but no one has found them, and most of the ones found are used to pretend to be ghosts." Lu Hanyang said, in fact, he was not like this before.

"This thing is not valuable, saltpeter is a common medicinal material, mostly used to reduce swelling and detoxification, and there is a laxative. There should be all of them in the herb store. Lu Hanyang said.

"It's as simple as that, but ...... Saltpeter has been used in medicine for so many years, why hasn't anyone found out about this? Li Er sighed in his heart, but it seemed that no one really knew about all this before, just like Chang'an City, so many people were crowded inside, and there were many people who suffered from heat stroke every day on a hot day, but no one knew how to use saltpeter to make ice.

Even those doctors didn't know, and sure enough, the immortals from the desolate land were well-informed. Li Er thought like this in his heart, and then looked at Lu Hanyang expectantly.

He is still thinking about what Lu Hanyang said about the war horses to reduce the loss, treat the sores, and let the world's poor scholars be able to study, they are all treasures.

Of course, Lu Hanyang also knew what Li Er was expecting, but did he really have to take out everything at once? Lu Hanyang felt that this kind of thing needed to be considered, and it was too early to be a mascot.

"Immortal Chief, please inform the rest of the things that can make Datang strong!" Li Er discharged to Lu Hanyang.

"Okay, I'll tell you a little bit, these things are actually very simple, just like this saltpeter to make ice, but it's just a different idea." Lu Hanyang said.

"Immortal Chief is merciful, I hope to inform you, after all, Datang needs these things, and this is completely a matter of immeasurable merit, Xiao Ke is willing to serve the immortal chief in the Taiji Palace in the immortal tablet and visit every day!" Li Er said.

"Forget about this immortal ranking, I want to live a few more years!" Lu Hanyang said. Li Er's words made Lu Hanyang less resistant to taking out these things.

Because the benefits of all this are those people who benefit the most, after all, printing will give countless poor scholars a way out, and the horseshoe can make the Tang Dynasty war horse more durable, so as to strengthen the military strength of the Tang Dynasty and protect the people.

There is also Artemisia annua that can treat malaria, a disease that arose after being bitten by mosquitoes in the south, and it is an incurable disease for this era. Although Artemisia annua is recorded in the Shennong Classic of Materia Medica, no one has yet discovered that it can treat malaria.

The people who benefit the most from this total are the people, so Lu Hanyang feels that this kind of thing should be done sooner rather than later, although according to his ideas, he doesn't want to be a mascot so early, but now he finds that in fact, all this has gone against his original intention.

"I came to this world, all I wanted was to improve my cultivation and protect the people on this side, so why did I have the idea of taking it out at the most critical moment?" Lu Hanyang thought in his heart.

"Is it to earn more real yuan? But as long as all this is taken out, the people have received benefits, and the true yuan will increase. What exactly? Lu Hanyang thought in his heart, he wanted to know what made him think of the previous idea because of this kind of thing.

After all, according to the reference in the game, he knew that his cultivation and improvement were not only the accumulation of true yuan, but also the improvement of the spiritual realm. For example, if refining and refining qi breaks through to refining qi and transforming gods, and the true yuan skyrockets, then it is difficult for him to control those skyrocketing true yuan if his mood is unstable.

At that time, maybe I can only do nothing, don't dare to act rashly, otherwise every move to bring up the true yuan is enough to destroy everything around me, if there is someone I care about, then it will definitely be a tragedy.

This kind of improvement only needs to go to the gym to read a few scriptures in the game, but in reality it is not so easy.

So he needs to face his heart and let himself know what is influencing his judgment, so that he actually thinks about using these things to increase his prestige.

He is already an immortal now, what prestige can he add? He's the strongest here, so he just needs not to ruin his reputation!

Facing your heart, then finding your weaknesses, and finally overcoming them, so as to make yourself more perfect, is the path to progress.

Lu Hanyang was thinking about it, and finally came to the conclusion: all this is vanity, the people get benefits, and the gratitude in their hearts will be obtained, but if you want to be in the limelight in front of others, then you can only turn the tide at a critical moment.

"I see! I get it! Lu Hanyang opened his eyes and thought for a long time in his consciousness, but it was only a short moment outside.

"This seat can tell you all this, and some things that this seat doesn't know much about, can also tell you, but Datang must ensure that the things that this seat tells you and others must not be used for profit, otherwise Hugh blames this seat for being merciless!" Lu Hanyang said.

"Immortal Chief, Xiao Ke can make an oath here, in the name of Xiao Ke's ancestor!" Li Er said.

"It's not enough, plus you Tang Jiangshan! After all, there are some things that can be said to have an impact on this world for eternity! Lu Hanyang said that he was ready to release a big killer weapon this time.