At night, in a simple courtyard of the princess's mansion, the courtyard is overgrown with weeds and dust.

In the center of the room there was a large stove, and there was a bellows by the stove, and a shirtless woman was wearing only a single coat pulling the bellows, and the wind entered the stove, and the flames in the hearth were moving.

An experienced master burned the iron tools that needed to be exercised in the furnace, and then moved them to the large iron pier on the side, and held a sledgehammer in the other hand to forge it, while chatting with the woman next to him.

In the corner of the room, a woman dressed in white stood at the table, she wore gloves and a homemade mask, took 100% caustic soda and added it to water to dilute and heat, because the conditions were limited, she could only use chopsticks to stir a few times and add a certain amount of iodine in turn for a response, and then call someone to find ice cubes and throw it in, she had to reduce the temperature of the reaction solution to below 30 degrees.

It is estimated that it is almost over, Yun Qiange went to the two blacksmiths to bring twice the theoretical amount of iron filings to reduce sodium iodate to sodium iodide, and then after the reaction, she put it in the pot to heat, and after it cooled, filtered it with a sieve, heated and evaporated crystallization, and then formed sodium iodide after drying. Finally, she pours sodium iodide into a mixture of alcohol and water.

Yun Qiange hooked the corners of her lips happily, the iodine wine was ready, I don't know if Antonio would jump out of the coffin and scold her to death if he knew that he had stolen his invention.

Yun Qiange carefully sealed the iodine wine and asked the two hired temporary blacksmiths to extinguish the fire.

She gave the silver holding a few large bottles of iodine wine and walked to her courtyard in a good mood, the water she used to show the word the day before yesterday was not ordinary water at all, but the iodine wine she made, it is very simple to make the font invisible, as long as you write words on the paper with rice soup, you need to show the words only with iodine wine to show the font, she was worried that the iodine wine she made was not good, so she used a whole basin, fortunately, she used rice soup to write her identity after each design draft.

But this is really thanks to those husbands who calculate themselves all day long, otherwise she wouldn't have kept an eye on everything.

"Princess, what have you done so much this time?" The sun flashed out of nowhere.

She handed the iodine wine in her hand to Ri, and said with a gentle smile: "I'm about to leave here, you send these bottles of iodine wine to the Shura Temple, tell the vanilla that we will all use rice soup to write in the future, and then apply this to show the characters." She secretly said in her heart, so that even if the letter was snatched, she would not have to worry about the content being read.

"Yes, Princess." The sun bowed and vanished. Yun Qiange kicked the stones on the ground and ordered lightly: "Mei, you send someone to put the few cans of iodine wine left in the side courtyard into the carriage, and take them with you when you leave in a few days." As he finished speaking, there was a noise in the woods, and then there was no movement.

After a good night's sleep, the people who were still sleeping were awakened.

"Princess!! Something is wrong!! ”

The person on the bed sat up lazily, her black hair poured down, and she rubbed her eyes sleepily: "Dieyi, how many times has this princess said, you must be calm and calm in case of trouble, don't be so angry." ”

"But...... But now that the whole capital has spread the word, Miss Situ has been sentenced to death for killing the county lord Li Enough, and Her Majesty the Empress has ordered that she be beheaded in seven days. ”