He had sprained his ankle, an injury that affected his muscles and bones. Wu Yao's contract with the Emerald Peacock did have some success in treating bleeding external wounds and mental trauma.
But it was of no use to muscle and bone injuries.
Wu Yao couldn't possibly have been unaware of this.
In Gao Wenyuan's view, Wu Yao's actions were more than just showing off her goodwill and kindness as the noble lady of the Wu Family of Lu City using him as a prop.
She was also taunting him.
Taunting him for having failed to attract Fang Mu, causing him mental distress.
Mainly, Gao Wenyuan could only express his gratitude to Wu Yao for such behavior. This was because only less it was fitting for his inherent character and his identity as a noble lady in the Gao Family.
Then he remembered how he failed to entice Fang Mu due to the accident caused by Master Lu Zhong.
Gao Wenyuan's mood corroborated a bit given the detail.