Display Substrate, Fabricating Method Thereof, and Display Device

An display substrate, comprising:

• a substrate;
• at least one pixel on a side of the substrate, the at least one pixel comprising a driving transistor, the driving transistor comprising a drain;
• an insulating layer on a side of the driving transistor away from the substrate, the insulating layer covering the driving transistor and having a first via hole opposite to the drain;
• an auxiliary conductive structure on a side of the insulating layer away from the substrate, and the auxiliary conductive structure connected to the drain through the first via hole;
• and
• a first planarization layer on a side of the auxiliary conductive structure away from the substrate, and having a second via hole disposed therein;
• wherein the at least one pixel comprises a light emitting region and a non-light emitting region surrounding the light emitting region;
• the driving transistor and the first via hole are in the light emitting region, and the second via hole is in the non-light emitting region.