Display substrate and driving method thereof, and display device

A display substrate, having a display region, the display region including N display zones, N being greater than or equal to 2;

• the display substrate comprising:
• a plurality of pixel circuits arranged in rows, each display zone being provided therein with a plurality of rows of pixel circuits;
• N groups of gate driving circuits respectively corresponding to the N display zones, wherein each group of gate driving circuits includes X gate driving circuits, X being greater than or equal to 2, each gate driving circuit of the X gate driving circuits is electrically connected to a plurality of rows of pixel circuits in a corresponding display zone;
• the X gate driving circuits are configured to output X scan signals of different functions to a plurality of rows of pixel circuits connected thereto;
• and
• at least one multiplex circuit, wherein each multiplex circuit is electrically connected to N gate driving circuits, which are configured to output scan signals of a same function, of the N groups of gate driving circuits, and is further electrically connected to N selection control signal terminals and a start signal terminal;
• and
• the multiplex circuit is configured to, under control of at least one selection control signal from at least one selection control signal terminal of the N selection control signal terminals, select at least one of the N gate driving circuits connected thereto, and transmit a start signal from the start signal terminal to the selected at least one gate driving circuit.