Chu Yunsheng only moved away for a few steps, then he suddenly turned around and asked, "how many thrusters does your flying machine have?"
Qin Qiying's mind was still filled with shock and confusion, so Chu Yunsheng's sudden question almost made her answer the question. Luckily the years of military training helped to stop her from leaking out the information.
After thinking for a second, the question Chu Yunsheng asked was not much of a big deal, and apart from the secret she was trying to hide, it seemed like no other intelligence could still be considered a secret in this time and age.
But she was not only one who knew that secret, there were three other very reliable officers who also knew about it. In order to safely send this secret to the capital, four of them were split up and escorted by different troops from different routes. However, she didn't care about other officers, she must make sure that she was not the one who leaked the information.