Display substrate, display device and method for manufacturing display substrate

A display substrate, comprising:

• a plurality of bearing parts for supporting display assemblies;
• and
• a connecting beam located between two bearing parts and connected to the two bearing parts,
• wherein the connecting beam comprises at least one stretchable portion with a hollow portion provided inside the stretchable portion, so that the stretchable portion is deformable in a first direction and a second direction, and the second direction is perpendicular to the first direction;
• wherein the stretchable portion has a substantially rhombus shape in the cross section parallel to the display substrate, and two diagonal lines of the rhombus are parallel to the first direction and the second direction, respectively;
• and
• wherein the rhombus shape formed by the stretchable portion has a first diagonal line and a second diagonal line, the first diagonal line is parallel to the first direction, and the second diagonal line is parallel to the second direction;
• the rhombus shape formed by the stretchable portion has a first included angle and a second included angle, and the first included angle is greater than or equal to the second included angle;
• the stretchable portion is switchable among a stretched state, a compressed state, and an initial state;
• when the stretchable portion is switched from the initial state to the stretched state, the first diagonal line is extended and the second diagonal line is shortened;
• when the stretchable portion is switched from the initial state to the compressed state, the second diagonal line is extended and the first diagonal line is shortened;
• when the stretchable portion is in the initial state, the first included angle is greater than or equal to 90 degrees and less than or equal to 150 degrees, and the second included angle is greater than or equal to 30 degrees and less than or equal to 90 degrees.