Link to Brief in PDF: MMBrief-PLAunits2017.06.15
The following two slides explain the difference and relationship between PLA unit categories (Legion, Formation, Unit, and Element), and the standing peacetime types of units (Theater Command, Theater Army/Fleet/Air Force, Group Army, Brigade, Battalion, Company, Platoon, etc.), and the temporary (often task organized) wartime formation types the PLA may use (such as campaign legion [战役军团], tactical formation [战术兵团], composite battalion [合成营], etc.)
