And the materials exchanged were of blue quality, so this person must have used the identification table to identify the blue quality materials, otherwise he would not know that the higher level is of blue quality.

He remembered the identification table. [Basic Identification Table (White): Place materials on it. After 10 seconds, it will emit a light of the same color as the level, which can be used to identify the level of items. Requires 20 Wood (White) and 20 Stone (White)]. It was of little use to him, but it was a basic tool that other survivors must have.

After taking a look at the person who sent the transaction, Xu Xin was stunned.

Li Wenxi.

The woman who just planted the tree house, I think this is her name?

I was so lucky that I not only grew a small tree house, but also found blue quality supplies and iron ore.

Huh? Could this woman also be in a similar resource area as him?

Xu Xin quickly initiated a private chat with her.

"Hello, do you have iron ore?"

The other side replied quickly: "Yes, exchange for blue quality supplies."

"Do you have any blue quality supplies?" Xu Xin asked again.

The other side hesitated for a while before replying: "Yeah."

"Do you want red berries that can provide two hours of night vision?" Xu Xin said frankly without any nonsense.

"Yes!" The other party replied quickly this time, "How much iron ore do you want to exchange?"

"I want to make a long-term deal with you, but before that, I want to know the function of the blue material you discovered."

The other party didn't waste any words. Perhaps because he knew that blue materials had special effects, he also believed that he also had blue-level materials. He replied directly: "[Stone (Blue): When crafting stone tools, just use one to greatly increase the tool's efficiency.]"

"Oh shit!" Xu Xin exclaimed.

This is good stuff!

He now uses a stone axe to chop down a green tree, and it takes ten axes to cut it down. This thing can actually improve efficiency!

You should know that the durability of a stone tool is only 200, so chopping less not only improves efficiency, but also allows one axe to chop down more trees!

Because it was voice input, Xu Xin's words were sent out directly.

This made him feel a little embarrassed.

“…” A string of ellipsis came from the other side.