Making you a son-in-law is not about making you conquer the world.

The bright moonlight and flickering candlelight illuminated Lin Ping's profile, revealing his handsome features and well-defined contours.

Jiang Yunying glanced at him casually, and a ripple stirred in her usually calm heart. She murmured softly, "This guy is actually quite good-looking when he's not causing trouble..."

Lin Ping is widely recognized as the most handsome man in Jiangcheng. His looks are naturally exceptional. If it weren't for his reputation as a spendthrift, women would probably be lining up outside Jiangcheng to come to him.

This is precisely where Lin Ping's wisdom lies. He doesn't want to be so handsome that he transcends gender, nor does he want to follow in Wei Jie's footsteps and be "killed by being stared at."

After a moment of confusion, Jiang Yunying regained her composure, forcefully broke free from Lin Ping's clutches, and left, though her gentle gaze was intriguing.

Lin Ping secretly opened one eye, looking at the pampered large hand, and thought to himself with certainty, "Master Ping won't wash his hands for three days, no, no, no... it should be three months..."

Clearly, Lin Ping was pretending to be asleep, determined to use tactics to win Jiang Yunying's heart.

"Lin Ping, what's wrong with you? You haven't fallen for the Iron-Faced Princess, have you?"

Suddenly, a strange thought came to Lin Ping's mind.

After spending the last few days with her, he grew to like Jiang Yunying's personality more and more.

She even often thinks about things that couples should do.

But he seemed to have forgotten that beneath Jiang Yunying's iron mask was likely an extremely ugly face.

Although Lin Ping wasn't obsessed with looks, the other person's appearance had to be acceptable, otherwise he would feel forced.

Thinking it over, Lin Ping still didn't waste those hands that carried Jiang Yunying's faint fragrance.

The next day, Lin Ping looked somewhat tired. Jiang Yunying had visited him once before going to the military camp, mistakenly thinking he was overworked, little did she know he was suffering from... well, you know...

Overnight, the Penicillium mold produced a large number of spores, and half of the spores began to grow, continuously releasing penicillin.

In other words, this day was crucial. Lin Ping kept a close eye on the porcelain bowl with a microscope, fearing that other bacteria might contaminate it and affect the purity of the penicillin.

The day was spent entirely waiting. Lin Ping once again tricked Jiang Yunying, even gripping her hand even tighter.

On the third day, Lin Ping was surprised to find that enough penicillin had accumulated in the bowl. The next step was to analyze the penicillin and the Penicillium mold.

"Little Li, bring the earthenware pot!"

Lin Ping roared loudly, not only out of excitement but also to vent his anger.

Li Mingxuan always wore a chrysanthemum-like smile, holding a clay pot the size of a wine jar in his hands and placing it in front of Lin Ping.

Next, Lin Ping found a funnel, put some cotton at the bottom, and slowly poured the culture medium from the porcelain bowl into the earthenware jar through the funnel.

The funnel naturally serves as a preliminary filter, removing some large particles of impurities.

The culture medium in a porcelain bowl was just enough to cover the bottom of the earthenware jar. Lin Ping then ordered Li Mingxuan to pour in a large bucket of rapeseed oil that had been prepared in advance.

"Little Li, stir it hard."

Lin Ping handed Li Mingxuan a wooden stick and said with a grin.

Faced with Lin Ping's smile, Li Mingxuan panicked. There must be something fishy going on, so he returned the smile and said, "How long are you going to keep this up?"

"Hmm, not bad, my little Li can think now..."

Lin Ping nodded in satisfaction and replied softly, "Stir until the oil and water can no longer be separated!"

"Okay..."

Li Mingxuan nodded, unaware of the secret behind it, and obediently began to work.

Lin Ping, however, kept turning his head and chuckling to himself, thinking to himself: If you can make oil and water not separate, then Da Niu will take your surname from now on!

Oil and water are two immiscible substances. Even if you grind a stick into a toothpick, you still can't make them dissolve. So, poor Li Mingxuan was tricked by Lin Ping. It's just that he didn't understand basic physics.

Li Mingxuan first stirred it slowly a few times and found that the oil and water had mixed together. He was overjoyed, thinking that he had completed the task, but after a short while, he found that the two separated on their own.

After trying several times, Li Mingxuan was desperate. He thought he wasn't working hard enough, so he started spinning his arms like a small motor. The rapeseed oil and culture medium in the jar formed a small vortex and came into close contact.

About fifteen minutes later, Li Mingxuan slumped to the ground, sticking out his tongue, and said, "I can't take it anymore..."

"Useless! You can't even do this simple job properly."

Lin Ping kicked Li Mingxuan in the butt, feigning anger, while secretly observing the earthenware pot under a microscope, a barely perceptible smile appearing on his lips.

In fact, after Li Mingxuan stirred it, the penicillin had dissolved in the oil, while the penicillin that Lin Ping needed was completely dissolved in the water.

Immediately afterwards, Lin Ping used a sterilized wooden spoon to scoop out the oil from the earthenware pot, leaving only the liquid containing a large amount of dissolved penicillin.

"Bring me the toner!"

Lin Ping said angrily.

Li Mingxuan turned pale with fright and hurriedly brought Lin Ping the charcoal powder he had prepared beforehand, as a way of making amends for his sins.

Lin Ping poured the carbon powder into the earthenware pot to absorb the penicillin inside. To achieve better absorption, Li Mingxuan stirred it frantically again.

The following work required meticulous attention to detail, and even the slightest deviation could lead to failure. Naturally, Lin Ping dared not let Li Mingxuan and the others take the lead.

So they took a hollow bamboo pole, stuffed cotton at the bottom, put charcoal powder inside, and washed it with distilled water, white vinegar, and alkaline water in turn.

Under the existing conditions, distilled water is easy to obtain. Lin Ping prepared a small cup and slowly poured it into a bamboo tube, which was then collected in a porcelain bowl.

Using a microscope, Lin Ping discovered that the distilled water hadn't washed out much penicillin, and shook his head helplessly before switching to white vinegar.

The white vinegar, also in a small cup, slowly passed through a bamboo tube and finally fell into a porcelain bowl, again yielding very little penicillin.

In this way, Lin Ping pinned all his hopes on the alkaline water.

The degree to which penicillin dissolves in water, acid, and alkali varies under different environments. No one can say for sure which porcelain bowl will contain penicillin, so it is necessary to use some bacteria to verify it.

If colonies form after seven days of incubation, it proves that there is no penicillin in the porcelain bowl; if no colonies form after seven days of incubation, it means that the porcelain bowl contains penicillin.

This process is the most time-consuming; seven days later, who knows what Pang Xingji will be like?

With his microscope, Lin Ping completely skipped this step; he could directly determine which porcelain bowl contained penicillin by observation.

Lin Ping brought over a cup of alkaline water and carefully poured it into a bamboo tube. As he watched the liquid drip into the porcelain bowl, his heart pounded like a small motor.

This cup of alkaline water has quite a history.

Wu Kingdom has not yet discovered natural soda ash mines, let alone high-strength caustic soda; almost all of its alkalis contain low levels of plant ash.

To achieve better results, Lin Ping chose seaweed ash, which, even though it is not as alkaline as soda ash, is still better than wood ash.

pat...

As the first drop of liquid fell, Lin Ping immediately magnified the microscopic effect of his left eye and was overjoyed to discover that it contained a large amount of penicillin. He jumped up and down excitedly: "Success! I've made penicillin!"