2 1 work clothes were renewed by the whole army in the winter of 20021,so its wearing time began in the winter of 20021. Specifically, 2 1 work clothes include spring and autumn uniforms in spring and autumn, winter uniforms and matching uniforms in winter, as well as standard shirts and work clothes required for each position. In terms of wearing time, it is suggested to choose according to the season and occasion to achieve good wearing effect and comfort.