That city was larger and far more prosperous than Heavenly Square City, imposing in every way. From the sky, the entire city was packed with uneven yet closely clustered buildings. Besides the flying boat Zhang Tie was on, quite a few other flying boats were arriving from all directions, taking off and landing at the air harbor outside the city.
A tall mountain stood at the center of the city, its buildings stretching from dozens of miles away all the way to the foot of the mountain.
Yet atop that mountain was an entirely different sight: a massive castle built against the mountainside in the style of the Sky-Piercing Realm, overlooking the entire city. Above the castle flew a crimson triangular banner bearing only one golden character—Si!
That "Si" character revealed the identity of this city's ruler.
As the feather-grade flying boat emerged from the clouds and drew near the enormous castle, a row of soldiers in gleaming, cold armor atop the gatehouse raised their heads and silently watched the descending vessel. A general-like figure waved a pair of blue flags twice from the gatehouse. A hundred-meter-long metal gate halfway up the mountain within the castle slowly opened, revealing the flying boat berths inside the mountain.
The flying boat carrying Zhang Tie and the others did not dock at the air harbor outside the city. Instead, after descending to a certain height, it slowly sailed into the mountain's interior.
Once inside the mountain, outsiders naturally could not see who had disembarked from the flying boat. The secrecy was carried out to the utmost extreme.
To hollow out a mountain and build flying boat berths within it required financial resources far beyond the ordinary. At the same time, the castle on the mountain projected an atmosphere of formidable troops and stern