How Fast Was the Sun Across the Vast Primordial Land?

Time flows slowly like water, never stopping for anyone, never being controlled by anyone.

More than a hundred years later, Hong Yun and his three treasure-refining partners emerged from seclusion, each carrying a top-grade mid-to-low-end Acquired Spiritual Treasure —a cauldron, a furnace, and a bottle—to show off to everyone.

It's clear that their treasure-refining skills are roughly equal. After all, they have all comprehended the ancestor's Formation and Restriction Dao, so their skill levels are naturally not too different.

However, it is very difficult to reach the highest quality. Even the 'Black Dragon Armor' that Qingqiu Li made for Wu Chu was made from the skin of Two-Headed Crocodile Dragon. It was only when the whole set was put together that it reached the high quality level. When taken out alone, it was only at the mid-level.

The Five-Element True Essence Qiankun Sword, which his ancestor helped him refine, was only of the highest grade, not reaching the peak of perfection, even though it was made using the Heaven-and-Earth Cauldron to achieve the Acquired Innate qualities.

To truly reach the pinnacle of perfection, one must take another step forward, and one will be among the Supreme Treasure.

As for Wu Chu and Houtu bringing so many people along, yet only giving away one top-grade Acquired Spiritual Treasure, isn't that a bit stingy?

Wu Chu sees it this way. "I've already brought everyone along to join in the fun, and Little Moon Spirit and those Little Flower Fairies are coming along too. Why would you care about the value of the gift?"

Haven't you heard the saying, "A small gift carries great meaning"?

Then, Wu Chu, Houtu, Qingqiu Li, along with Little Moon Spirit and Xiao Yu, four disciples, and the Little Flower Fairies and pets, Zhen Yuanzi with Qingfeng and Mingyue Hong Yun, and Hong Yun alone, flew towards the sun on clouds.

"Master, are Senior Di Jun and Taiyi Taiyi's Solar Palace located on the sun?" The one who asked this question was Huanglong, Wu Chu's eldest disciple.

Wu Chu was puzzled by this question, because Huanglong should have known it long ago.

Seeing Wu Chu's puzzled expression, Huanglong continued, "I'm just curious, the sun rises in the east in the morning and sets in the west in the evening. How far does the sun travel in a day? The Solar Palace is right in the middle of the sun, don't they feel dizzy?"

This question made Zhen Yuanzi and Hong Yun chuckle, while Qingqiu Li and Houtu smiled faintly, seemingly finding the question rather naive.

Hong Yun laughed heartily and said, "They are Daluo Immortals! Why would they be afraid of being shaken?"

Upon hearing Hong Yun's words, Wu Chu couldn't help but burst into laughter.

Then, he simply brought out the Tower Ship and had everyone Tower Ship.

Seeing this, Hong Yun pointed to the sky, and a cloud path formed by red clouds appeared before everyone, so magnificent that it was intoxicating.

Under the control of Wu Chu, the Tower Ship sailed upstream along this cloud path.

Under the influence of the Dao of Qiankun, the Tower Ship appears to be tilting as it flies upwards along the cloud path. However, inside the Tower Ship, the Tower Ship is flat, so people standing on it do not need to cast spells or worry about slipping backwards.

Wu Chu looked at Huanglong and asked with a smile, "Do you feel it's shaky?"

"..."

Huanglong scratched his head and smiled somewhat awkwardly.

The others burst into laughter upon seeing this.

Wu Chu patted him on the shoulder, turned around and looked around, a hint of mischief in his eyes, and asked with a smile, "You're laughing so loudly, do you know why we don't feel swaying?"

As he spoke, he looked at Hong Yun and said, "Brother, don't tell me it's because we're Daluo that we're not afraid of shaking. Even without using any magic power, we wouldn't feel any shaking at all!"

Upon hearing Wu Chu's words, everyone's smiles faded, and Huanglong, who had been somewhat embarrassed, now looked at Wu Chu with curiosity.

Hong Yun touched her chin to ease the awkwardness, then asked, "Why is that?"

"I call this relative stillness of an object..." This involves junior high school physics knowledge. Wu Chu explained it to them in very simple terms, and smiled, "Now you understand, this actually has nothing to do with our own cultivation level! Relative to the entire Sun Star, the Solar Palace is still. No matter how fast the Sun Star moves, the Solar Palace within the Sun Star remains stationary."

Upon hearing this, everyone suddenly understood.

Wu Chu continued, "If there are no other points of reference, the beings in the Solar Palace cannot sense the movement of the Sun Star. Just like now, if you don't look at the clouds outside, can you feel the ship drifting forward?"

Upon hearing this, everyone looked at the clouds outside the ship and indeed, it was just as Wu Chu had said.

Wu Chu shook his head and said, "Actually, these kinds of things can be found everywhere in our lives. For example, when Old Round swings his iron rod, isn't the power of swinging it while standing still less than the power of swinging it after rushing forward? Do you know why?"

Old Round scratched its fluffy head, and Wu Chu felt that its head was missing something; Rolling and somewhat unsightly.

"Speed?"

Old Round looked at Wu Chu with some uncertainty.

Wu Chu nodded and said, "That's right, it's about speed. For the same mass... for example, with the same Old Round stick, the faster it's swung, the stronger the attack power, right? This is actually the energy generated when we give an object an acceleration..."

Wu Chu then gave a simple explanation, leaving everyone speechless.

Once the reasoning is explained clearly, it's actually quite simple and easy to understand, but they never usually think about why.

After everyone had a moment to process this, Wu Chu turned to Huanglong and said with a smile, "I originally thought you would ask, 'Why is the Primordial Land so vast and boundless? How can the sun rise in the east and set in the West in a single day?'"

Wu Chu's question once again astonished everyone.

Because of this, they had never even considered it.

Come to think of it, in the Primordial Land, from east to West, even for powerful experts like Hong Yun and others at the Daluo Realm, even if they used supernatural abilities like the Qiankun Shifting Art to travel, it would still take them two or three years, or even longer, to make a trip.

Even with Wu Chu's cultivation level, using the Qiankun Shifting Art to travel would be faster than the speed of light, because this is already a spatial jump, not a linear movement speed.

In terms of linear speed, even Daluo would find it difficult to surpass the speed of light.

The so-called Rainbow Transformation Art is at most the speed of light, and it doesn't even exceed the speed of light.

However, techniques Spatial Leap Art or Qiankun Shifting Art can disregard spatial boundaries, allowing one to jump from one point to another, thus exceeding the speed of light.

So, how did the Sun Star manage to do that?

This is a question that even Hong Yun and Zhen Yuanzi, and even Houtu, who often ponders nonsensical questions, had never considered, let alone the little ones.

So everyone turned to Wu Chu, hoping Wu Chu could answer their questions.