Method for maintaining display panel, display substrate, and display device

A display substrate, comprising:

• a base substrate, as well as a first metal layer, a first insulating layer, and a second metal layer which are laminated on one side of the base substrate, wherein the first metal layer comprises a plurality of gate lines, and the second metal layer comprises a plurality of data lines;
• and
• a second insulating layer and a common electrode metal layer which are laminated on one side of the second metal layer away from the base substrate, wherein the second insulating layer is disposed close to the base substrate, and the common electrode metal layer comprises a plurality of metal line segments and a plurality of connecting line segments;
• wherein the plurality of metal line segments comprises first metal line segments and second metal line segments, the first metal line segments extend along a direction of the data lines, and orthographic projections of the first metal line segments on the base substrate overlap orthographic projections of the data lines on the base substrate;
• the second metal line segments extend along a direction of the gate lines, and orthographic projections of the second metal line segments on the base substrate overlap orthographic projections of the gate lines on the base substrate;
• the connecting line segments are configured to connect the adjacent first and second metal line segments, each of the connecting line segments is provided with a maintenance line segment, orthographic projections of the maintenance line segments on the base substrate do not overlap the orthographic projections of the gate lines and data lines on the base substrate respectively, and a spacing between the orthographic projections of the maintenance line segments on the base substrate and the orthographic projections of the gate lines and data lines on the base substrate is greater than or equal to a preset distance, wherein the preset distance is greater than zero;
• and
• two adjacent second metal line segments and the connecting line segments connected to and disposed between the two adjacent second metal line segments jointly define a hollow area.