Every year from mid-July to mid-August. "Joining the army with ranks" means that college graduates pass the recruitment examination organized by local colleges and universities before joining the army, sign an agreement after being shortlisted successfully, and then join the army. After retiring from active service, they can choose to return to work. According to Linyi Jun 'an's enlistment notice, the registration time for Linyi Jun 'an to join the army with a rank is from mid-July to mid-August every year. Linyi, a prefecture-level city under the jurisdiction of Shandong Province, is a regional central city of Shandong Province approved by the State Council, a livable city with waterfront characteristics, a modern industrial and trade city and a commercial and logistics center.