Group 1 - The State Intellectual Property Office of China shows that Guangdong Power Grid Co., Ltd. and Southern Power Grid Energy Development Research Institute Co., Ltd. have applied for a patent titled "Carbon Tax Revenue Return Method, System, Equipment, and Medium Based on CGE Model," with publication number CN121481748A and application date of September 2025 [1] - The patent involves a dynamic CGE model that includes four economic entities and divides the overall economy into 27 production sectors, distinguishing between electricity and non-electricity sectors based on production characteristics and energy usage types [1] - The invention aims to analyze the impact of different carbon tax policies on economic entities by simulating the effects on both electricity and non-electricity sectors under various carbon tax policy scenarios [1] Group 2 - Guangdong Power Grid Co., Ltd. was established in 2001, located in Guangzhou, primarily engaged in electricity and heat production and supply, with a registered capital of approximately 6.68 billion RMB [2] - The company has invested in 93 enterprises, participated in 5,000 bidding projects, and holds 5,000 patent records, along with 174 administrative licenses [2] - Southern Power Grid Energy Development Research Institute Co., Ltd. was founded in 2017, also located in Guangzhou, focusing on research and experimental development, with a registered capital of 100 million RMB [2] - This institute has invested in one enterprise, participated in 1,482 bidding projects, and holds 482 patent records, along with 21 administrative licenses [2]