两个小阴线夹着一根大阳线

The two of them quickly moved away and approached a hill that looked like the end of a grassland. See a place where sky and water meet. A tall building was built. On both sides of the building, city walls extend. There is no end in sight. The city walls are heavily guarded. There seemed to be a group of patrolling immortal cultivators from time to time, pointing in the direction where the two of them were....