Forced to marry a disabled man in the countryside? I'll repay you tenfold!

Su Wanqing held the paper bag steadily. "Don't be afraid, breathe slowly, yes, inhale, exhale, slowly..."

About a minute later, the patient's cyanotic complexion improved visibly. A little over a minute later, he loosened his grip on his throat and opened his eyes, looking dazed.

Su Wanqing then moved the paper bag away. Commander Feng's eyes regained their clarity, and he finally felt alive again.

"What...what's wrong with me?" Commander Feng's voice was hoarse.

Su Wanqing explained gently, "Commander Feng, you were breathing too fast and too deeply just now, causing excessive carbon dioxide to be expelled from your body, which led to respiratory alkalosis. Respiring your own exhaled air through a paper bag can increase the concentration of carbon dioxide in the inhaled air, correcting the alkalosis and alleviating the symptoms. How are you feeling now?"

(Note: If you experience any of the above symptoms, quickly put a garbage bag over your head to relieve them.)

Commander Feng took a moment to feel better: "Much better. I really thought I was going to suffocate just now, it was so uncomfortable. Thank you so much, doctor! I'm so grateful!" He was still shaken but also filled with gratitude. "Do I... still need to go to the hospital?"

"It's alright for now. You just need to relax and get some rest. There's nothing else wrong," Su Wanqing said calmly, nodding slightly to Zhou Yanshen to indicate that the first-aid kit could be put away, as it was completely unnecessary.

Hearing her calm tone, Commander Feng felt even more at ease: "That's good, that's good! By the way, I haven't yet asked your name, comrade? We really owe you a debt of gratitude today. If it weren't for you, this old man of mine probably wouldn't be here..." He spoke sincerely, "My name is Feng Zhengguo. If it's convenient, please leave your contact information. I'll definitely send a thank-you letter to your unit later. Once my work here is finished, I'll certainly visit you in person to express my gratitude!"

Being saved is not something that can be easily resolved with a simple thank you. Moreover, the young female doctor in front of him was calm, quick-witted, and skillful. He felt both grateful and admiring, and had already decided to give her a proper commendation, and also to give a good shout-out to her unit.

Su Wanqing smiled slightly: "Commander Feng, you're too kind. My name is Su Wanqing, just an ordinary doctor who did what I was supposed to do. Your situation was indeed urgent, but the fact that I was able to alleviate it in time shows that you are blessed. There's really no need to thank me in person. However, if you have any other health problems in the future, you can come to the health clinic of the 65th Regiment in Ili Prefecture to see me, and I will do my best."

The battalion commander himself suffered from high blood pressure, and such hyperventilation could have easily triggered a serious cardiovascular or cerebrovascular accident if not handled properly. Of course, for Su Wanqing, this emergency rescue was not particularly complicated. What truly thrilled her was the series of spatial notifications ringing in her mind—this meant that the "reward" for saving someone had arrived, and it seemed exceptionally generous! She couldn't wait to go into her spatial dimension to check it out.

The train conductor then squeezed in to smooth things over: "Alright, alright, Commander Feng, it's good that you're safe. Dr. Su did the same thing last time she saved someone, doing good deeds anonymously, purely out of a doctor's compassion. Let's all stop crowding around and let the commander get some rest."

Commander Feng was filled with both admiration and respect: "Comrade Su is truly a man of noble character... The 65th Regiment, right? Good, our itinerary happens to take us to that area as well. After our work is finished, I will definitely visit him to express my gratitude!"

Su Wanqing smiled and nodded, not taking it seriously.

The crowd gradually dispersed. Su Wanqing returned to her bunk, seemingly closing her eyes to rest, but her mind had already sunk into the spatial dimension. Sure enough, several prompts clearly appeared:

[Successfully saved the "inevitable death" person. The target person is upright and virtuous, with accumulated merit points +100. Due to the subsequent karmic connection with them, an additional blessing reward is received: Premium Shiitake Mushroom Spawn ×1.]

[One purified strain of Tremella fuciformis was obtained.]

[Receive 1 copy of high-efficiency rhizobium inoculant (propagable type), with detailed instructions for use.]

Su Wanqing was overjoyed.

She had saved many people at the hospital before, but this was the first time she had been directly rewarded with a rare bacterial strain like this.

Shiitake mushrooms and white fungus are both extremely precious ingredients these days, and most of what's available on the market is wild-harvested, resulting in limited supply and high prices. Even if artificial cultivation techniques exist, they are not yet widespread, leading to very low yields. Having these two high-quality fungal strains means she can continuously cultivate and process them within the space, making them invaluable whether for personal use, sale, or as a starting point for her future business.

She understood the first two rewards at a glance, but what was the third one, "rhizobium agent"? A thought struck her, and she opened the instructions to read them carefully. After a moment, even though she was mentally prepared, she couldn't help but take a deep breath, and her eyes lit up.

Surprisingly, the most valuable one was the third one!

At that moment, the enthusiastic train conductor was gesturing as he recounted the terrifying scene to Chen Xiuer and Aunt Wang: "You didn't see it! Dr. Su picked up a brown paper bag and 'whoosh!' shoved it over that tour leader's face! We were all stunned! But hey—in less than two minutes, his complexion returned to normal, and his breathing became easier! Dr. Su said it was something like 'hyperventilation'... It was absolutely amazing!"

Su Wanqing sat on the edge of the bed, seemingly listening, but her mind was still absorbed in the explanation of the rhizobium agent. She was so engrossed in reading that she couldn't help but exclaim in surprise.

Zhou Yanshen immediately leaned over, his eyes filled with concern: "What's wrong? Are you feeling unwell?" He was worried that his wife might have had a miscarriage while running all the way.

Su Wanqing snapped out of her daze and quickly shook her head, suppressing her excitement: "It's nothing, I'm just happy to have saved someone."

Zhou Yanshen didn't say anything more, but he found it strange that his wife had saved so many people, but she had never been like this before. What had happened to her?

With more than half an hour to go before arrival, everyone continued chatting, and the atmosphere in the carriage was relaxed.

Su Wanqing continued to ponder the "rhizobium"—which, to put it simply, is a natural biological nitrogen-fixing fertilizer. In this era of extreme shortage of chemical fertilizers (especially nitrogen fertilizer) nationwide, its value was simply immeasurable.

It can not only increase the yield of legume crops (such as soybeans, alfalfa, and peanuts) by more than 30%, but also improve the soil and reduce reliance on chemical fertilizers. Moreover, the microbial agent produced by Space has extremely high activity and can propagate on its own.

This means that she can obtain an almost endless supply of "biological nitrogen fertilizer" whenever she wants!

How precious is this thing?

It's no exaggeration to say it's comparable to gold. If dozens of kilograms of the propagated inoculant were sent to the Academy of Agricultural Sciences, it would likely cause a stir throughout the entire agricultural system; experts would probably fight tooth and nail to get their hands on it.

It is extremely low-cost, easy to apply, and highly effective; it is practically a portable "yield-boosting magic weapon." If the news were to spread, countless communes, farms, and even higher-level organizations would try every means to obtain it.