Group 1: Patent Application - A patent titled "A Construction Process for Rotating Steel Box Beams Across Existing Lines" has been applied for by four companies: China Railway First Engineering Group Co., Ltd., China Railway First Group Co., Ltd., China Railway Xi'an Bureau Group Co., Ltd., and China Railway First Survey and Design Institute Group Co., Ltd. The patent was published under CN121295632A with an application date of October 2025 [1] - The patent involves a construction process that includes several steps: building supports, positioning tracks, pre-positioning the steel box beam, rotating the beam, removing tracks, and adjusting the beam's angle to reduce interference with existing lines [1] Group 2: Company Profiles - China Railway First Engineering Group Co., Ltd. was established in 1997, located in Xi'an, with a registered capital of 502.43 million RMB. The company has invested in 6 enterprises, participated in 5,000 bidding projects, and holds 381 patents [2] - China Railway First Group Co., Ltd. was founded in 1980, also in Xi'an, with a registered capital of 6.37 billion RMB. The company has invested in 208 enterprises, participated in 5,000 bidding projects, and holds 3 trademarks and 3,178 patents [2] - China Railway Xi'an Bureau Group Co., Ltd. was established in 2005, located in Xi'an, with a registered capital of 15.37 billion RMB. The company has invested in 37 enterprises, participated in 5,000 bidding projects, and holds 89 patents [2] - China Railway First Survey and Design Institute Group Co., Ltd. was founded in 1992, located in Xi'an, with a registered capital of 107 million RMB. The company has invested in 76 enterprises, participated in 5,000 bidding projects, and holds 3 trademarks and 3,427 patents [3]

Group 1 - The State Intellectual Property Office of China has granted a patent for a method of adjusting fixed air separation cold boxes to Shanghai Twenty-First Metallurgical Construction Co., Ltd. and China Twenty-First Metallurgical Group Co., Ltd. The patent authorization announcement number is CN117702806B, with an application date of November 2023 [1] - Shanghai Twenty-First Metallurgical Construction Co., Ltd. was established in 2003 and is primarily engaged in civil engineering construction. The company has a registered capital of 630 million RMB and has made investments in 7 enterprises, participated in 5,000 bidding projects, holds 8 trademark registrations, and has 2,088 patents along with 145 administrative licenses [1] - China Twenty-First Metallurgical Group Co., Ltd. was founded in 2001 and focuses on professional technical services. The company has a registered capital of 2.05 billion RMB, has invested in 105 enterprises, participated in 5,000 bidding projects, holds 5,000 patents, and has 1,049 administrative licenses [1]

Group 1 - A new company, Sichuan Anjin Huaxin Construction Engineering Co., Ltd., has been established with a registered capital of 30 million RMB [1] - The legal representative of the company is Long Zhiyan, and it is wholly owned by Sichuan Xingyi Environment Co., Ltd. [1] - The business scope includes construction engineering, water conservancy project quality testing, and construction supervision [1] Group 2 - The company is classified under the construction industry, specifically in civil engineering and other civil engineering sectors [1] - The registered address is located in Nanchong City, Yilong County, Wenglin Community, People's North Road [1] - The company is a limited liability company with no fixed term of operation, registered until January 6, 2026 [1]

Group 1 - The core viewpoint of the news is the application for a patent by China Wuyi Group Co., Ltd. and China Metallurgical Chengdu Survey and Design Institute Co., Ltd. for a modular prefabricated post-tensioned building structure and method, which aims to enhance structural efficiency and seismic performance [1] Group 2 - China Wuyi Group Co., Ltd. was established in 1980 and is based in Chengdu, primarily engaged in civil engineering and construction, with a registered capital of approximately 538.41 million RMB [2] - The company has made investments in 140 enterprises and participated in 5,000 bidding projects, holding 32 trademark records and 5,000 patent records, along with 3,873 administrative licenses [2] Group 3 - China Metallurgical Chengdu Survey and Design Institute Co., Ltd. was founded in 2000, also located in Chengdu, focusing on professional technical services, with a registered capital of 20 million RMB [2] - The institute has invested in 1 enterprise, participated in 5,000 bidding projects, holds 374 patent records, and possesses 42 administrative licenses [2]

Group 1 - China Three Gorges Construction Group Co., Ltd. has obtained a patent for a "synchronous triggering circuit and system for dynamic monitoring network equipment applicable to dam safety," with authorization announcement number CN116192283B, applied for on December 2022 [1] - China Three Gorges Construction Group Co., Ltd. was established in 1992, located in Beijing, and primarily engaged in civil engineering construction, with a registered capital of 2 billion RMB [1] - The company has invested in 21 enterprises, participated in 2,242 bidding projects, holds 15 trademark registrations, and has 1,444 patent records, along with 2 administrative licenses [1] Group 2 - Nanjing NARI Water Conservancy and Hydropower Technology Co., Ltd. was established in 2012, located in Nanjing, and primarily engaged in the manufacturing of electrical machinery and equipment, with a registered capital of 326.66 million RMB [1] - Nanjing NARI has participated in 2,339 bidding projects, holds 277 patent records, and has 26 administrative licenses [1]

Group 1 - Zhuhai Zhongke Advanced Technology Research Institute Co., Ltd. has obtained a patent for a method and system for processing temperature measurement data of fans, with authorization announcement number CN120744586B, and application date in August 2025 [1] - Zhuhai Zhongke Advanced Technology Research Institute Co., Ltd. was established in 2017, located in Zhuhai City, and primarily engages in technology promotion and application services, with a registered capital of 40 million RMB [1] - The company has made investments in 4 enterprises, participated in 89 bidding projects, holds 1 trademark, has 319 patent records, and possesses 27 administrative licenses [1] Group 2 - Guangdong Zhongke Sensor Smart Technology Co., Ltd. was established in 2015, located in Zhuhai City, and primarily engages in the manufacturing of instruments and meters, with a registered capital of 5.722887 million RMB [1] - The company has made investments in 5 enterprises, participated in 17 bidding projects, holds 3 trademarks, has 38 patent records, and possesses 7 administrative licenses [1] Group 3 - Shenzhen Zhongzhian Co., Ltd. was established in 2007, located in Shenzhen City, and primarily engages in civil engineering and construction, with a registered capital of 20 million RMB [2] - The company has participated in 977 bidding projects, holds 2 trademarks, has 62 patent records, and possesses 16 administrative licenses [2]

Group 1 - The State Intellectual Property Office of China has granted a patent titled "A Construction Platform Based on High-rise Steel Structures" to China Railway 24th Bureau Group Fujian Railway Construction Co., Ltd., Fujian Chuanjiang Construction Engineering Co., Ltd., and China Railway 24th Bureau Group Co., Ltd. The patent authorization announcement number is CN120797940B, with an application date of September 2025 [1] - China Railway 24th Bureau Group Fujian Railway Construction Co., Ltd. was established in 1990 and is located in Fuzhou City. The company primarily engages in civil engineering construction and has a registered capital of 500 million RMB. It has participated in 5,000 bidding projects and holds 170 patents [1] - Fujian Chuanjiang Construction Engineering Co., Ltd. was established in 2016 and is also located in Fuzhou City, focusing on housing construction. The company has a registered capital of 10 million RMB and has participated in 4,488 bidding projects, holding 1 patent [1] Group 2 - China Railway 24th Bureau Group Co., Ltd. was established in 1990 and is based in Shanghai. The company primarily operates in the civil engineering construction sector with a registered capital of 2 billion RMB. It has invested in 88 companies, participated in 5,000 bidding projects, and holds 1,090 patents [2] - The company also has 6 trademark registrations and 846 administrative licenses [2]

Group 1 - Keda Data Co., Ltd. has obtained a patent for a "soft start method, device, and rectifier circuit compatible with single three-phase" with authorization announcement number CN120511966B, applied on July 2025 [1] - Keda Data Co., Ltd. was established in 1999 and is located in Xiamen, primarily engaged in the manufacturing of electrical machinery and equipment, with a registered capital of 515.414041 million RMB [1] - The company has invested in 47 enterprises, participated in 3,856 bidding projects, holds 130 trademark information, and has 1,404 patent information, along with 36 administrative licenses [1] Group 2 - Xiamen Metro Construction Co., Ltd. was established in 2023, located in Xiamen, primarily engaged in civil engineering and construction, with a registered capital of 100 million RMB [1] - The company has invested in 1 enterprise, participated in 106 bidding projects, and holds 13 patent information [1]

Group 1 - Guangdong Provincial Construction Engineering Group Co., Ltd. has obtained a patent for a "wear-resistant and corrosion-resistant spiral pile," with authorization announcement number CN223766811U, applied on December 2024 [1] - The patent relates to photovoltaic support installation equipment technology, specifically involving a spiral pile that includes a conical end and spiral blades, with a first coating of galvanized layer and a second coating of polyvinylidene fluoride [1] - This innovation enhances the wear and corrosion resistance of the spiral pile, extends its service life, protects the metal surface, prevents a decline in conductivity, and ensures stable grounding performance for photovoltaic systems, thereby reducing maintenance costs [1] Group 2 - Guangdong Yue Water and Electricity Energy Investment Group Co., Ltd. was established in 2023, focusing on electricity and heat production and supply, with a registered capital of 1 billion RMB [2] - The company has invested in 52 enterprises, participated in 6 bidding projects, holds 14 patents, and has 5 administrative licenses [2] - Guangdong Hydropower Second Bureau Group Co., Ltd. was founded in 2013, specializing in construction installation, with a registered capital of 1.5 billion RMB [2] - This company has invested in 23 enterprises, participated in 584 bidding projects, has 15 trademark records, 149 patents, and holds 21 administrative licenses [2]

Group 1 - Yunnan Ling'er Construction Engineering Co., Ltd. has been established with a registered capital of 2 million RMB, fully owned by Kunming Linchen Enterprise Management Co., Ltd. [1] - The legal representative of the company is Yuan Bo, and it is located in Guangnan County, Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan Province [1] - The company's business scope includes construction engineering, project supervision, interior decoration, and various engineering services, among others [1] Group 2 - The company is classified under the construction industry, specifically in civil engineering and other civil engineering sectors [1] - The business operations are subject to approval from relevant authorities as per legal requirements [1] - The company has a business duration until January 5, 2026, with no fixed term thereafter [1]