Feng Ao Si was not completely stupid.
Even he knew that it was not possible for them to defeat Zhang Xu Kingdom, a large kingdom, in just a matter of days. Unless they have an overwhelming advantage against Zhang Xu Kingdom, it would just be a pipe dream.
He knew very well that during spars with his sibling and cousins, he couldn't defeat them easily unless the difference in strength was so big. Just like when he was fighting against his grandfather, Old Master Nan easily beat him to pulp.
That was because he was too weak as compared to Old Master Nan.
But the strength difference between Zhang Xu Kingdom and Fei Yang Kingdom was definitely not so overwhelming. If anything, many people thought that their strength were more or less the same.
Because of that, it would be impossible for Fei Yang Kingdom to completely conquer Zhang Xu Kingdom so easily.
They had to infiltrate into Zhang Xu Kingdom slowly but surely.
