The long-term layout demands utmost patience, and there cannot be any mistakes every time. The most crucial thing is, you must predict that this city will be built on this tract of land.
Aside from the unique ability of the Buddha Kingdom to control reincarnated people, no other force can achieve this step.
He needs to avoid the spies of the Demon Realm, carefully selecting extremely meticulous individuals. Apart from appearing calm and reliable before reincarnation, they must also perform well after reincarnation to be selected. Once chosen, they come to the grassland for various reasons, such as doing business, fleeing hardship, or getting exiled, and then try to drive the cattle and sheep herds near that place. They only have a few days to make subtle changes to the foundation without overdoing it, lest it causes too much energy fluctuation, and not lingering too long, to avoid attracting attention.