Display panel and testing method thereof

A display panel, comprising a product region and a cutting region disposed outside the product region, the product region comprising a display sub-region and a non-display sub-region, wherein the display panel comprises:

• a flexible substrate;
• a thin film transistor layer disposed on a side of the flexible substrate and corresponding to the display sub-region;
• an organic light-emitting layer disposed on a side of the thin film transistor layer away from the flexible substrate and corresponding to the display sub-region;
• an encapsulation layer disposed on a side of the organic light-emitting layer away from the thin film transistor and at least corresponding to the product region;
• and
• a touch layer disposed on a side of the encapsulation layer away from the organic light-emitting layer, wherein the touch layer comprises a plurality of touch electrodes and a plurality of touch leads, the touch electrodes are disposed corresponding to the display sub-region, an end of each of the touch leads is connected to a corresponding touch electrode, the other end of each of the touch leads extends from the non-display sub-region to the cutting region, and a density of the touch leads in the cutting region is less than a density of the touch leads in the non-display sub-region, and
• wherein an insulating layer is disposed between the flexible substrate and the touch leads and positioned in the non-display sub-region and the cutting region, the insulating layer is provided with a plurality of first via holes defined in the cutting region and a plurality of second via holes defined in the non-display sub-region, and the touch leads in the cutting region passing through the first via holes are connected to the touch leads passing through the second via holes in the non-display sub-region.