Group 1 - The core viewpoint of the article is that Zhongtong Bus Holding Co., Ltd. has applied for a patent for a hydrogen leak detection method and device for fuel cell buses, indicating a focus on safety and innovation in hydrogen technology [1] Group 2 - The patent, published as CN 120992114 A, was applied for on August 2025, showcasing the company's commitment to advancing hydrogen fuel cell technology [1] - The invention includes a hydrogen gas bottle, multi-branch variable distance sensor bracket, hydrogen concentration sensors, and a central controller to detect hydrogen leaks [1] - The method constructs a diffusion cloud map based on the initial positions, movement speeds, and operational times of the hydrogen concentration sensors, allowing for real-time identification of leak locations [1] - This technology addresses inherent limitations of simulation and empirical methods in terms of real-time response, environmental complexity, and sudden incidents, making it particularly suitable for safety scenarios requiring rapid response [1]