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Every day, the mobile phones of the project leaders and on-site construction personnel of the Fourth Engineering Office of China Coal No.5 Construction Company receive short messages such as "Please don't forget safety in busy work", which is an innovation of the Youth League Committee of the Engineering Office in safety publicity activities. According to the fact that the construction site is scattered and the safety management is difficult, the Youth League Committee of China Coal No.5 Company has launched a new method of "warm and safe short message". They organized a special person to take "caring for life and paying attention to safety" as the main content, edit mobile phone short messages with warm words and send them to the mobile phones of project managers and front-line workers.