After relying on the motherland, my supermarket has become more and more prosperous.

Before Jiang Wanwan brought it to me, she ate shaqima and instant noodles for free.

Li Yun didn't think it was an offense to let it test weapons against evil spirits, nor did he have any reluctance.

Moreover, Li Yun was very curious about what kind of weapon could ordinary people use to deal with evil spirits?

So he couldn't wait to ask: "What kind of weapon? Take it out and let's see it!"

"You can't see the effect of this thing in the store." Jiang Wanwan shook her head.

Then, he walked around the cashier counter and headed towards the door. Seeing this, Li Yun followed closely behind him.

Jiang Wanwan stopped at the entrance of the supermarket, glanced at Li Yun who had also stopped beside her, and politely made a request.

"Excuse me, please stand outside the store. You can't feel the power of the weapons inside."

After all, the supermarket protective shield not only protects Jiang Wanwan and the store staff, but also the customers standing in the store.

Hearing this, Li Yun was stunned, but did not refuse. He walked forward calmly and then stood on the steps outside the store.

Seeing this, Jiang Wanwan flipped her hand and took out a palm-sized canned item from the system grid.

Li Yun looked at what she took out with a surprised expression. The appearance of this weapon was far different from what he had imagined!

At this moment, Jiang Wanwan had no mind to pay attention to anything else. She was silently reciting the instructions for using Professor Xu Jinghuai's flash bomb in her mind!

As someone who has never come into contact with this kind of thing, even though I have tried it several times before on Earth.

But now that she is using it alone, Jiang Wanwan is still a little unskilled and needs to think it over carefully.

Follow the steps while reciting the formula silently.

In the end, Jiang Wanwan threw the flash bomb out of the supermarket.

Given her current arm strength, this flash bomb can actually be thrown a very long distance.

But this is not protected by a supermarket shield, and it is for testing effects.

Therefore, Jiang Wanwan did not use her full strength, and the flash bomb finally fell only dozens of meters away from the supermarket door.

The next moment, like a bolt from the blue, a huge and unbearable sound exploded in the air, followed by a flash of light that was a hundred times more dazzling than the arc light of an electric welding machine.

After Jiang Wanwan threw the flash bomb, she subconsciously covered her ears and turned her back.

However, she realized the next moment that there was a supermarket protective shield and she didn't need to be so cautious.

So, he put down his hands and turned around, paying attention to Li Yun's situation beside him in the light so bright that he could hardly see anything.

One second, two seconds, three seconds...

After the noise exceeding 180 decibels disappeared and the dazzling light weakened, Jiang Wanwan finally saw clearly Li Yun's current condition.

Li Yun, who was standing outside the door, was tilting his head to avoid direct contact between his eyes and the dazzling light.

In front of it, a transparent barrier emitting a soft light rose up, resisting everything that had just happened.

After the effect of the flash bomb disappeared for a few seconds, Li Yun turned around and waved his hand to remove the barrier around him.

From Li Yun's expression and actions, Jiang Wanwan could infer that the previous attack should not have caused any harm to it.

She felt a little disappointed, but she quickly adjusted herself and focused on the most important issue.

"Are you okay? How's it going? How's the weapon working?"

Li Yun looked at Jiang Wanwan in a daze, then looked at the supermarket door which had not changed much after the light, and finally his gaze returned to Jiang Wanwan.

Li Yun asked in disbelief, "Was that really the energy from the jar itself? Was it not some magic you used?"

Oh, that requires her to know magic!

Jiang Wanwan understood Li Yun's disbelief very well.

After all, science and magic are two completely different paths. The more you are exposed to them, the more likely you are to doubt life.

But Jiang Wanwan still said: "Of course, I just flipped a switch. Anyone can do it."

After hearing this, Li Yun still had an expression of disbelief.

Jiang Wanwan thought for a moment, then took out a flash grenade from the system grid and handed it over, saying, "Or else, try it yourself!"

"Is it okay?" Li Yun was stunned and asked hesitantly.

"Of course, come in and I'll teach you!" Jiang Wanwan nodded and said enthusiastically.

Things like flash bombs are destined to become luxury goods in the weird world, and there is no need to worry about insufficient inventory.

Therefore, there is absolutely no problem in taking out a few more to test and listen to the sounds, as long as you can confirm the effect in the end.

The steps to use a flash bomb are not difficult. The biggest risk is that you may hurt yourself, but this is obviously not a problem for Li Yun.

So, after Jiang Wanwan explained the usage process twice, Li Yun nodded, indicating that he had mastered it.

Afterwards, Li Yun left the supermarket again and did the same thing as Jiang Wanwan had done just now.

With previous experience, Jiang Wanwan did not cover her ears or turn around this time.

So, he witnessed the entire process of the flash bomb being activated, and also saw the barrier that Li Yun had set up before it was activated.

With the supermarket's protective cover in place, the light outside is bright but not glaring, and the noise is loud but not unpleasant to listen to.

This happened in a supermarket in another world. If it were on Earth, Jiang Wanwan would have been blinded, deafened, and unconscious if she had dared to do this without dodging or avoiding.

After three or five seconds, the light and noise disappeared, and Li Yun's barrier was removed again.

Jiang Wanwan then asked, "How about it? No need to use magic, right? Just pull the switch, ordinary people can use it too."

Having personally tested it, Li Yun naturally had no doubts. He nodded sincerely and said, "It's a very powerful thing."

"So how do you feel about the effect? It should be able to cause damage to the evil spirits, right?" Jiang Wanwan asked with concern.

After listening to the question, Li Yun recalled the results of the two times, and then gave his conclusion.

"The loud noise has a very deterrent effect, and the continuous light can even cause damage to evil spirits. For example, if you throw a small spirit that has only eaten three to five hundred people, you can directly hit it so hard that it can't maintain its human form in the sunlight."

"Even if we encounter a vicious monster like yesterday, if we are caught off guard, we can still cause it considerable trouble. It's not a problem to delay it for a few moments."

A little ghost that ate three to five hundred people? This is really a new adjective!

However, the light from the flash bomb can indeed cause damage to the evil spirits, which is good news.

At least it proves that Jiang Wanwan and his team made the right choice of direction for the goods, and the quota for the goods was not wasted.

As for the evil monster they encountered yesterday, even though Jiang Wanwan used her special powers, it didn't cause any effect.

The flash bomb can delay for a while, and the effect is already very good.