PLA chain of command:
班 (squad) <
排 (platoon) <
连 (company) <
营 (battalion) <
团 (regiment) <
师 (division). The
部 'department, headquarters' suffix attaches to indicate the command element:
连部 'company HQ',
营部 'battalion HQ',
团部 'regiment HQ'. Nearly always seen in war films and military fiction.