In fact, the Mirage Country relied on being far from the eastern and western continents, and had its own sly and sneaky thoughts in many places in the past. The Shen Emperor was also an ambitious ruler.
Externally, the Mirage Country only declared itself as a Kingdom, and its name was without any issue. However, internally, the King of Mirage Country was referred to as the Shen Emperor, which in itself was a transgression.
Meanwhile, according to general conventions, the capital of the Mirage Country could only be called King City, but the Shen Emperor named it Shen Capital. This in the early years caused much dissatisfaction among many countries.
But at that time, the emperor was far away, and the navy fleet of the Mirage Country was strong, so no one could address the transgression of the Mirage Country. Eventually, it was left unresolved. This is why the Shen Emperor is the Shen Emperor and the capital is called Shen Capital.
