"Division, Division..." Long Fei called several times in a row.

"Lord, what's up?" After long Fei called several times, Chen Qun just reflected from deep thought.

"military division, come here quickly. I seem to understand what's going on!" Longfei went on.

"Oh, Lord, what's the matter?" After Chen Qun finished speaking, he hurriedly ran over!

"military division, look Long Fei pointed to the smooth wall.

"it's just an ordinary wall. What's so strange?" Chen Qun said doubtfully after reading it.

Longfei smiled and said, "don't worry, military division, look at the other walls!"

after listening, Chen Qun looked at the other walls and compared them with what I said. Then...