Display substrate and display apparatus

A display substrate, comprising:

• a base substrate;
• and
• a display unit which is on the base substrate and comprises a display region and a non-light-emitting region, wherein the display region comprises a sub-pixel, the sub-pixel comprises a driving transistor and a light-emitting device, the driving transistor is configured to control magnitude of a driving current flowing through the light-emitting device, and the light-emitting device is configured to receive the driving current and be driven by the driving current to emit light;
• the light-emitting device comprises a first electrode and a common electrode, and the common electrode is connected to a common voltage terminal;
• the display unit comprises:
• an auxiliary electrode line, comprising a longitudinal portion located in the display region and a lateral portion at least partially located in the non-light-emitting region, wherein the lateral portion is connected to the longitudinal portion;
• a first auxiliary electrode, in the non-light-emitting region and electrically connected to the common electrode;
• and
• an auxiliary insulation layer, comprising a first auxiliary via hole located in the non-light-emitting region and exposing at least part of the lateral portion, wherein the first auxiliary electrode is connected to the lateral portion through the first auxiliary via hole;
• the lateral portion, the first auxiliary electrode, and the first auxiliary via hole constitute one auxiliary unit, and the display unit comprises a plurality of the auxiliary units;
• the lateral portion of the auxiliary electrode line extends along a first direction, the longitudinal portion of the auxiliary electrode line extends along a second direction intersecting with the first direction, and the plurality of the auxiliary units are arranged at intervals in the second direction.