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As for why he focused on these two Chaos Main Cities, the main reason naturally was coveting the Chaos City Lord Steles of these two cities.
This matter was related to the city level upgrade of Blazing Plains City. To raise Blazing Plains City from level 0 to level 1, there were only two ways.
Either fuse with the city core of another Chaos Main City or use Domain Source as a substitute. Having seen the preciousness of the Domain Source, Gu Ran knew it was currently impossible to obtain. Therefore, he could only set his sight on the city cores of other Chaos Main Cities.
Another reason, according to Gu Ran's own speculation, was that near a Chaos Main City, there must be human gathering points, city ruins, and the like. Otherwise, wouldn't the "Conquer Chaos Main City" gold main quest in the mystery shop be a joke?
