Tiejun refers to a team with "iron faith, iron faith, iron discipline and iron responsibility", which is especially hard-working, especially fighting and dedicated. Xi is in a critical period of catching up, with arduous tasks, lofty missions and great responsibilities. The times call for the iron army, and the cause calls for the iron army. It is necessary to forge an Xi iron army that is loyal to the party, brave in taking responsibility, honest and clean, and provide strong organizational support and team guarantee for the development of various undertakings.