The Scum Is Elaborate 

"I guess no one would come in the meantime." Cheng Sheng said after they crossed the other side of the river. 

They have finally left the city. They can go find a place to hide, but only temporarily. He can't set up a barrier around them to alert them of the incoming enemies since they can't use talismans or arrays in Heilong Realm. 

The talismans they have aren't the evil type – which is normally used by the demonic cultivators. So, they would be exposed if they would use talismans. They also can't use arrays, which is the area where Cheng Sheng excels, since the qi used to create the array would expose them. Fortunately, the three of them are martial arts experts, and some of the best, so they didn't dare use qi carelessly. Or else, they would have already exposed themselves as soon as yesterday when they were ambushed. 

They could only rely on their instinct, their ability to perceive danger, their martial arts, and their meticulous planning.