If we consider Lu Ya as a prince of a top-tier country, and this prince, fascinated by the civilization of a backward little nation, insists on traveling there, despite the country's lack of safety, which nearly leads to the prince's life being endangered.
In such a situation, he dispatches a fully armed, well-equipped team to that backward little nation to protect his safety...
It's perfectly reasonable.
Since refusal is not an option, then find a way to maximize it in a way that benefits the Central Earth Kingdom, Da Jin Dynasty, and Yellow Dragon Country.
And the opportunity for development...
"Perhaps, we should revive the glory of the Ancient Xia Civilization from back then."
Dong Xuanyuan said: "For the Lingxiao Palace Master to be so interested, I don't think the myths and legends of the Ancient Xia Civilization are merely simple tales."
Han Guanglie nodded in agreement.