Even if the opposing Inborn Grandmaster personally took action to infiltrate, such a situation would be unlikely to occur.
Because Lu Yuan only planned to help Li Xiong capture the Erhai region, as for the area east of Erhai, the eleven Yi countries directly controlled by Da Changhe Country, and a large part of Hui Chuan Country, he did not have much desire.
Adding all these territories together, it would amount to half a county.
With this foundation, after a little consolidation, including the two Inborn Grandmasters within Da Changhe Country, they might barely maintain a hegemonic position.
Da Changhe Country, which has not lost everything and still retains a large part of its family property, will naturally not engage in personal battles with the Grandmaster, sneak attacks, and massacres.
Because Lu Yuan's side can do this, they can also do the same in return.
In the end, it's a contest of attrition, endurance, and who dies first.