For now, it seems quite effective.

First, merge the Yang energy into the blood and qi, then let the blood and qi integrate back into the Yang energy. Finally, the body's power is twisted together like a rope, creating a separate human circulatory system.

When Wen Yan was expanding to the limbs earlier, it went very smoothly, purely through persistent effort.

He took the offerings from Grandma and relied on Blood Lock to endure it because if any problems arose in the expanded areas, they mainly affected just the limbs.

Even if there were issues with the limbs, they wouldn't immediately be fatal.

But now that he was expanding to the torso, moving from the outside inwards, Wen Yan noticed problems.

Especially when Bai Jiahui assisted him in cultivation, the blood and qi were fierce and hard to control.

When expanding and connecting to the five organs, he noticed the limitations of his previous methods.

Elsewhere was fine, but if he reached the heart and made a mistake, even with Blood Lock, he might fall into a coma if not controlled well.

His previous cultivation had him hovering on the edge, repeatedly making risky attempts. Even when problems arose, it didn't mean he'd immediately collapse.

However, he had seen before that even with Blood Lock, if one suffers instantaneous damage enough to empty the health bar, a person might not die due to Blood Lock but would still be powerless to resist.

Wen Yan's cultivation explorations were solo; if he ended up in that state, no one could save him.

Moreover, he only had Blood Lock, not some super self-healing ability.

Blood Lock, in terms of the health bar, only locks at 20%, not 100%.

Wen Yan had pondered this matter for several days and couldn't find a more suitable candidate than Zhang Xuewen.

Wen Yan explained the risks and issues to Zhang Xuewen with great detail, even demonstrating personally to help him understand.

Considering it might involve parts of the Scorching Sun Fist, Wen Yan opened a channel and traveled to Fuyu Mountain to consult the Grand Uncle Master about possibly sharing part of the Scorching Sun Fist with someone else.

The Grand Uncle Master didn't even ask who would learn it; he directly said,

"Times have changed. If you think it's reliable, go ahead and teach. There's no need for so much tradition now."

The Fourth Great-uncle Master didn't mind either, stating that as long as Wen Yan didn't put the Scorching Sun Fist online altogether, everything else was fine.

Preventing it from being uploaded online was purely because the Scorching Sun Fist is risky; most people could end up in trouble if they practiced blindly.

If it were to be put online, only the first layer could be posted, allowing people to use it as an introductory boxing technique without problems; the rest shouldn't be shared.

Wen Yan didn't think much about it, chatted for a while, and then left in a hurry.

After Wen Yan left, the Grand Uncle Master cheerfully enjoyed some tea, savoring it blissfully.

The Fourth Great-uncle Master also laughed, pouring tea.

They didn't care who Wen Yan would teach; the fact that Wen Yan came to ask was enough.

Because those who can practice the Scorching Sun Fist either have Wen Yan guiding them closely like a son or have the foundation to practice by themselves.

In either case, Fuyu Mountain was indifferent.

Wen Yan, along with Zhang Xuewen, first taught Zhang Xuewen the First Phase of Scorching Sun Fist. It was very simple; in Fuyu Mountain, it's used as a foundational entry-level boxing technique without much difficulty or danger.

Zhang Xuewen himself already had a Martial Path background, making it very simple for him to learn this kind of thing.

Wen Yan taught him hand-in-hand, and within half a day, Zhang Xuewen had almost mastered it. Following that, he directly empowered him with the Explosive Great Sun, accelerating his progress, allowing him to get used to controlling the new power.

Zhang Xuewen's path differed from Wen Yan's; he directly started with the Explosive Great Sun, feeling as if he had reached the state of the last day of the month.

He didn't gradually carve out a path like Wen Yan, but instead covered every corner with immense Yang energy, forcing the Yang energy itself to find suitable paths, exceeding critical limits.

This method was more dangerous and damaging, with a 100% probability of problems within a day.

The next day, Zhang Xuewen's spine was damaged, and his legs lost sensation.

However, he was unfazed and continued according to Wen Yan's method, combining it with his characteristics.

That afternoon, Zhang Xuewen began urinating blood, which terrified Wen Yan just watching.

This guy was terrifyingly reckless.

"Maybe we should take it slow? Do it next month at a steady pace?"

"No, as long as I don't die, I'm okay. I've already felt it, my strength is increasing, my pure physical power is rising, don't stop me, let me continue, tomorrow's the end of the month, I can't wait."

Once Zhang Xuewen got a taste, he seemed possessed, and Wen Yan couldn't persuade him otherwise.

In just over a day, his legs were paralyzed first, then his kidneys failed, followed by his liver. By sundown, his breathing sounded like a broken bellows, wheezing harshly.

The five organs began to fail; if it weren't for Blood Lock forcibly holding onto 20% of his health bar, he would have already died countless times.

Not only did Wen Yan find Blood Lock useful and quite addictive for cultivation.

Zhang Xuewen became addicted to it on his first try, hell-bent on testing Blood Lock's limits, refusing to stop until he almost killed himself.

Wen Yan, seeing this, realized perhaps he had been a bit conservative. Well, maybe not conservative; he just thought it best not to go overboard, sparing Grandma a bit of worry.

By nightfall, he hadn't eaten dinner, and Wen Yan watched Zhang Xuewen, pale-faced and heavily panting, before his eyes rolled back, and he fainted.