a base substrate, comprising a display area and a peripheral area located outside the display area; wherein the peripheral area comprises a gluing area;

a plurality of signal lines, located on a side of the base substrate, wherein each of the signal lines extends from the display area to the peripheral area;

a plurality of fanout lines, located on a same side of the base substrate as the signal lines, wherein the plurality of fanout lines are provided in the peripheral area and are connected with the plurality of signal lines in a one-to-one correspondence;

wherein, a fanout line comprises:

a first fanout line;

a second fanout line, located on a side of the first fanout line away from the base substrate; wherein at least in the gluing area, an orthographic projection of the second fanout line on the base substrate substantially overlaps an orthographic projection of the first fanout line on the base substrate; in part of an area outside the gluing area, the orthographic projection of the second fanout line on the base substrate and the orthographic projection of the first fanout line on the base substrate have a non-overlapping area, and a dimension of an overlapping area of the orthographic projection of the second fanout line on the base substrate and the orthographic projection of the first fanout line on the base substrate in a direction perpendicular to an extension direction of the fanout line is smaller than a first preset threshold; and

the display substrate further comprises:

a first insulating layer, located between the first fanout line and the second fanout line;

a second insulating layer, located on a side of the second fanout line away from the first fanout line; wherein the second insulating layer has a first segment difference and a second segment difference;

wherein, the first segment difference is a distance between a surface on a side of the second insulating layer covering the second fanout line away from the base substrate and a surface on a side of the second insulating layer between adjacent second fanout lines away from the base substrate in an area where the orthographic projection of the second fanout line on the base substrate does not overlap the orthographic projection of the first fanout line on the base substrate;

the second segment difference is a distance between a surface on a side of the second insulating layer covering the second fanout line away from the base substrate and a surface on a side of the second insulating layer between adjacent second fanout lines away from the base substrate in the gluing area; the second segment difference is smaller than the first segment difference.