However, more than one hour later, Master Ja, who razed the empty city to the ground, searched in the ruins three times, finally had to admit that this godforsaken place had wasted his countless valuable time, money, and Ziliujin. It truly was an empty city. The so-called 'ambush' consisted of only two masks and an owl that had soon flown away.

Master Ja tightened his teeth to the point of almost drawing blood: "Where are the path-finder Eagles? Go at full speed!"

At this time, on the path from Dong'an to the capital, Gu Yun, who was hiding under a tree, received the Qian Li Yan given by Tan Hong Fei and watched several path-finding Eagles whistling from over the top of their heads and speeding towards the capital.

He spat out the straw he was currently chewing in his mouth and patted the Wind Slasher behind him: "Old Lian, you have made a grand contribution."

Tan Hong Fei asked in a low voice, "How was it?"

"Can you see that?" Gu Yun said lazily, "The foreigner in charge must already be dead or wounded by now. The current leader is obviously unfamiliar with the area around the capital, otherwise he would not be as impulsive as to send Eagles to fly around."

In the imperial city, the capital had always been strict, no one was allowed to sneak a peek at will. Black Eagles dared not fly around, even in exceptional times, and they could only land at the base of the Northern Camp then ride into the capital on horseback after removing the Eagle's armor.

But most people did not know, the reason why the Black Eagle dared not fly was not because the Black Iron Camp was particularly strict in following regulation. Gu Yun knew that once the Eagles flew across the border, it was easy to make contact and run into the 'anti-air net'.

Outside the Nine Gates of the Capital, there was an invisible 'anti-air net' that was built during the reign of Emperor Wu and had taken thirty years to complete. It was a masterpiece of the Ling Shu Institute. There were numerous hidden piers under the net, and the main commander was on the top of Qi Yuan tower.

The reason why the building was so high was that besides providing food, drink, and entertainment for visitors from all over the world, it also played a very important role - it was the main pier of the anti-air net.