C597 Big Battle with Yousheng(1)

Liu Mang walked over and knocked on the stone. He knocked it with the same rhythm of three long and two shorts. Soon, there was the same knocking sound coming from the other side of the stone. Liu Mang nodded his head and took a few steps back.

"All of you, retreat."

As Liu Mang spoke, Liu Yang knew that something was not right. Mu Fei also quickly retreated