"...You mentioned just now that you were fortunate enough to obtain a seed of the World Tree. Could it be this World Tree?" Xu Xin pointed downwards.

"Yes." Xu Ying nodded in agreement. "It's this World Tree. It's also one of the keys to this plan. Hmm... now is probably the most critical point. The speed of time flowing is truly far beyond our expectations."

At this time, Ji Chaoyang spoke.

"Xu Ying, I'd like to ask, are the weapons in your hands only... at the level of a thousand years ago? You... should have weapons with higher technology, right?"

This is actually the question Xu Xin has always wanted to ask.

Although the top weapons from a thousand years ago were powerful for them, they were no match for alien invaders...

Thousands of years ago, seven billion people on Earth and so many powerful countries were defeated. What could these people do with these weapons?

Not to mention that the alien invaders have been developing for another thousand years!

Xu Ying was silent for a few seconds before saying, "We can quickly mass-produce the weapons I just mentioned. Combined with the World Tree and Crystal City, these weapons will be enough to protect us and give us time to develop."

"We also have more advanced weapons, the alien technology our team developed back then, standing on the shoulders of the alien invaders. But... now is not the time to bring them out. You don't yet have the ability, nor the energy and technology, to use, manufacture, or even mass-produce those weapons."

As she spoke, her expression darkened slightly.

Those weapons were from another time and space. Once she handed them over, she would most likely...

…It’s no use giving it to them now.

Moreover, at this stage, she is still needed to transfer the technology and talents from below to the upper level. If she is gone, it will be difficult to deal with.

To be honest, she was relieved that there was a reason not to give away those weapons and technologies.

She doesn't want to die yet.

"So, we need to take the first step first. Yingying, do you want to send the equipment and people up now?" Xu Xin asked.

"Ah... not that urgent." Xu Ying glanced out the window. "Time flies so fast here, so... there's no need to rush for a day or two, right? We should prioritize developing this area so we can take on the supporting facilities later."

Xu Ying's eyes were a little evasive at this moment, which could not be seen unless you looked closely, and her hands were clasped in front of her chest.

Um……?

Looking at her appearance at this moment, Xu Xin raised his eyebrows slightly.

He was very familiar with this girl's appearance.

This is obviously what she looks like when she's lying.

What is being concealed?

"Is it really safe here? We survivors are still a little worried that something might go wrong here." Qi Xuefei suddenly asked.

"Ah, don't worry about that for now." Xu Ying pointed to the roots of the World Tree on the small blackboard. "The World Tree's root system is very developed, penetrating thousands of meters underground and extending to areas hundreds of kilometers away."

At the same time, she introduced the structure of the World Tree:

"The World Tree matured under the energy of the crystal energy core, so the tree's strength is even around 10% of the crystal's. Don't underestimate this 10%. You all know the strength of crystal. Even at 10% of its strength, it's almost impossible to damage it."

"Furthermore, even if it's damaged, it doesn't matter. The World Tree can recover by absorbing nutrients and energy from the earth. Not only can it feed back energy to the crystal energy core, but even if the tree is damaged, it can recover quickly. And the speed of recovery is so fast that it is invisible to the naked eye."

Finally, she concluded, "So, the World Tree is still very safe. At least I haven't heard of the World Tree being destroyed."