The Sword Sect couldn't possibly develop an intelligence network to such a detailed extent.
The Zhishou Tower is now highly unreliable; moreover, although the Zhishou Tower operates in secrecy, for someone like Qing King, a prince of the Great Xia, there are actually no real secrets.
With his resources, it wouldn't be too difficult—not to say completely controlling the Zhishou Tower within Qing State—but certainly to render its intelligence network ineffective in Qing State.
Therefore, Lu Qingshan had no reason to refuse the goodwill of Shui Yue Pavilion Master.
The "external network" of the Heavenly Secret Pavilion spans the Human Realm, which is how it can collect information comprehensively—the "external network" is responsible for gathering vast and intricate information, while the inspectors of Heavenly Secret Pavilion focus on monitoring the secrets.
Within Qing State, there are no inspectors from Heavenly Secret Pavilion, but the "external network" exists.
