Gu Tianxing considered subduing Guo Tong and Jiang Lengyan an unexpected turn of events.

Afterward, he didn't keep Jiang Lengyan by his side. After giving her some instructions, he let her go, not worried that she would inform the people of the Huangji Dao Sect.

The Dust-Sealing Mark of the Gu Family can only be cultivated by the family head or the young master about to take the position. Even some of the Gu Family's ancestors haven't practiced it. If Jiang Lengyan ever thought of having it removed by a master from the Huangji Dao Sect, she would meet her demise.

Moreover, this mark can only be detected by a Supreme-level being if Jiang Lengyan doesn't expose it herself.