Core Viewpoint - The article highlights the critical role of signal workers at the Hargai Signal Workshop near Qinghai Lake, emphasizing their dedication to maintaining railway safety during operations, especially during peak travel seasons like the Spring Festival. Group 1: Signal Workers' Responsibilities - Signal workers are responsible for the maintenance of 198 signal machines along a 160-kilometer railway section, ensuring their effective operation for train safety [10] - The effective display distance of signal machines ranges from 800 meters to 1500 meters, and any failure to meet these standards can pose safety risks [8] - Signal workers are referred to as "light masters" due to their crucial role in maintaining the visibility and functionality of signal lights [8] Group 2: Work Environment and Conditions - The Hargai Signal Workshop is located in a remote area near Qinghai Lake, where workers face harsh weather conditions while performing their duties [10][12] - Workers are required to carry heavy tools and climb heights of up to 6 meters, emphasizing the physical demands of their job [19] - The work environment is characterized by cold winds and challenging conditions, yet the workers remain committed to their tasks [26][27] Group 3: Safety Protocols and Procedures - Safety is a top priority, with constant reminders to adhere to safety protocols and avoid exceeding work limits [17] - Each maintenance operation, such as cleaning lenses and measuring voltage, is conducted with meticulous attention to detail to eliminate potential safety hazards [21][24] - Workers are trained to ensure that all equipment is in optimal condition before it is put into operation [24]