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As the scope of pilot power auxiliary services continues to expand, major provincial power companies are clarifying the main status of demand-side response resources and energy storage resources as market participants one after another. Electricity auxiliary services are developing towards diversification, and a fair, transparent, competitive and orderly market mechanism for sharing auxiliary services is taking shape. The active participation of energy storage devices, demand-side resourcesand third parties in electricity market services will promote the development of new industries such as new energy consumption, electricity market transactions and virtual power plants. This paper summaries the participation patterns and trading mechanisms of demand-side resources in domestic and international markets, analyses how domestic demand response resources can be used to participate in the ancillary services market, and makes corresponding suggestions for the development of the ancillary services market in the domestic power industry.