He doesn't have only this one option.
Minister Qi understands clearly. Previously, he orchestrated the ruin of Princess Weisaiya's reputation and ensured her engagement to King Qi for the sake of this trade negotiation. He hadn't anticipated that the Beirong Prince didn't regard Princess Weisaiya highly. Even if he had been angry before, it should have dissipated by now. By not giving him face now, isn't he afraid King Qi will treat Princess Weisaiya poorly?
It seems now that this Beirong Prince, having been sent out, truly is a member of the Imperial Family who prioritizes interests above all. Princess Weisaiya is merely a stepping stone.
The true determinant of their cooperation is solely benefits.
Minister Qi pondered this and found it unsurprising. After all, Beirong wouldn't sacrifice trade interests for a mere princess.
"I've heard Prince Zilun is inquiring about the weaving machine?" Minister Qi personally poured him tea.
