In fact, Li Shimin's motivation was not simply due to the rapid recovery of Kyushu.
At its core, it was still the influence brought by the Gu Clan.
In the original history—
Li Shimin was an emperor with exceptional intellect. Besides pacifying through martial force, he also believed that "the Hu and Yue are one family with the Central Plains," advocating that "a king views the four seas as one family."
In the original history's court, minority generals accounted for half the officials, and tens of thousands of Turkic families resided in Chang'an, with over a million incorporated into the Great Tang's household registration.
Even in the original history, Li Shimin was like this, let alone now with the precedence set by Gu Chen and Gu Ye.
He would only become more resolute.
Integrating foreign races, strengthening Kyushu, opening trade routes, and thereby creating a prosperous era.
This is undoubtedly a feasible path.
