Display substrate, manufacturing method thereof, display device and mask plate

A display substrate, comprising:

• a base substrate, comprising a display region and a peripheral region surrounding the display region, the peripheral region comprising a first peripheral region extending in a first direction and a second peripheral region extending in a second direction, the first direction intersecting the second direction, and a size of the display region in the second direction being not greater than a length of the second peripheral region;
• a voltage terminal, located in the first peripheral region, and comprising a first power voltage terminal and a second power voltage terminal, the first power voltage terminal being configured to provide a first power voltage signal to an organic light emitting element located in the display region, and the second power voltage terminal being configured to provide a second power voltage signal to the organic light emitting element;
• a first power signal line, located in the display region and extending in the second direction, the first power signal line being configured to be electrically connected with the first power voltage terminal;
• a second power signal line, located in the peripheral region, and configured to be electrically connected with the second power voltage terminal;
• wherein the second peripheral region comprises at least two sub-regions arranged along the second direction, the at least two sub-regions comprise a first sub-region and a second sub-region, the second sub-region is located on a side of the first sub-region away from the voltage terminal, the second power signal line comprises a conductive layer, and a sheet resistance of the conductive layer located in the first sub-region is greater than a sheet resistance of the conductive layer located in the second sub-region.