They had to maintain the highest level of stealth while constantly changing their movements, sometimes flying at an angle, sometimes landing to sneak, sometimes moving straight, sometimes in zig-zagging trajectories, sometimes moving in short bursts of acceleration, sometimes at a constant very slow speed.
Though some of the precautions were only required for Qian Ying as he was the only one using a movement technique that generated wind with his movements, so he had to adjust to the flow of the wind when passing through formations that were sensitive to wind movement and Qi flow.
He was also surprised to learn that neither Wu Long or the twins needed a special Alchemy Pill that thinned out the aura of their specific Qi frequency since Bahshi Ghost Presence technique often used alongside Bahshi Ghost Steps already had that effect.
