Sun Su explained from the side: "We usually go to buy Zhang Sanjia tofu and basically walk this alley, and my little sister is no exception, because compared to walking the avenue outside, it takes much less time to walk this alley."

This alley is not very long, and the slow pace only took about a quarter of an hour before almost leaving.

However, what is regrettable and frustrating is that I am about to leave this alley, and no clue is found in it.

"Sir, wait... there are traces here."

However, at this moment, Li Changfeng suddenly made a sound, pointing to the wall inside, and the rest of the people looked at him.

His eyes fell on the wall, and Li Yu did not find any special place. He came forward and, under the guidance of Li Changfeng, he finally discovered something strange.

These were two shallow and parallel traces, so shallow that no one could notice them.

These two traces were quite long from bottom to top, as if they were gently scratched by something, and were in a very high position, almost as high as Li Yu.

Li Yu tried to see what he could see from it, but he couldn't see anything. He could only look at Li Changfeng with confusion: "This is..."

Li Changfeng said: "Sir, if I guessed correctly, these two traces should be the traces of the friction of the shoes."

Upon hearing this, Li Yu had not made any statement yet, and Li Hongxiu, who was beside him, couldn't help but lift his right foot, touched the wall with the tip of his shoe, and then gently stroked up.

Suddenly, a trace appeared on the wall, and the difference was very big from the two traces, and there were not many similarities.
Chapter completed!