Group 1 - The company, Aerospace Changzheng Chemical Engineering Co., Ltd., has applied for a patent for a hydrogen production system that operates under high pressure, low load, and frequent start-stop conditions [1] - The patent application was filed on June 2025, and the publication number is CN120443203A [1] - The system includes components such as electrolyzers, oxygen and hydrogen separators, coolers, and compressors, designed to manage the gas ratios effectively to prevent system shutdowns [1] Group 2 - Aerospace Changzheng Chemical Engineering Co., Ltd. was established in 2007 and is based in Beijing, primarily engaged in specialized equipment manufacturing [2] - The company has a registered capital of 535.99 million RMB and has invested in five enterprises [2] - It has participated in 1,865 bidding projects and holds 532 patents along with 43 trademark registrations [2]