The Chinese military has been practicing frugality, and the air force has recently held a professional backbone training session without issuing new document cases. Instead, trainees are provided with used ones, which must be returned after the training for reuse. According to China Military Times, trainees were instructed to collect document cases bearing signs of previous use at the entrance of a meeting room. Leaders of the unit stated that to implement the requirements of thrift and frugality, they have decided to start with document cases to address issues like repeated procurement and idle waste. The unit has established a management model for document cases involving unified purchase, centralized storage, distribution before meetings, collection after meetings, cleaning and disinfection, and recycling use. *** In response to the growing emphasis on environmental sustainability and cost-saving measures within the military, similar practices have been observed across other branches. This approach not only addresses immediate budget concerns but also promotes a culture of resource conservation among personnel. Experts note that such initiatives reflect a broader trend of the military adapting to changing fiscal realities while maintaining operational readiness. The use of reused document cases is part of a larger effort to reduce waste and enhance logistical efficiency, which could serve as a model for other organizations.