The meeting with Rebrov and Voronin wasn't exactly successful, but it wasn't a complete failure either. Although nothing was said with Kofupake, Gao Yang still felt something was off because Rebrov's attitude changed too quickly.
From being angry about Kofupake selling missiles privately to being all jovial after receiving the money, Gao Yang felt Rebrov's attitude change was a bit abrupt. Even if he received a large sum of money, his anger seemed to dissipate a bit too quickly.
If his anger hadn't actually dissipated but he pretended otherwise, it could only mean he was hiding it on purpose. The consequence might be that he's preparing to strike back at the right moment, which should be the normal reaction of most people.
Gao Yang felt Rebrov was problematic, yet he handed over the money without hesitation because he hoped to solve a big issue with a small sum of money.
