What is the origin of the place name Huangtuling?

There are two versions of the origin of the place name Huangtuling: an emperor built a palace site, sent his ministers here to inspect and draw a map, and later named it "Huangtuling" because no soil was selected; Second, this place is mostly yellow soil, whose real name is Huangtuling, and later evolved into "Huangtuling", which is homophonic.