The air feather-class airboat was heading forward at a speed of over 600 miles per hour. It was not its maximum speed, but its normal speed, at which it would not arouse the others' attention.
The airboat was flying above the white clouds in the air like a sailing boat traveling in the ocean. Zhang Tie was like a shell that attached itself to the sailing boat. The difference was that Zhang Tie was lying on the top of the airboat; instead of its bottom. Additionally, with the combined effects of invisible shen bead and the master-level hiding skill, Zhang Tie was completely invisible to the others.
As he didn't know about the situation inside the airboat, when he remembered Ji Yuelan's warning, he didn't directly make a spree killing inside the airboat to save the beauties; instead, he prepared to figure out the situation inside the airboat from outside first.