Can someone provide the explanation for the differences between Heavy, Medium, Light, and HIMOB CA brigades?
and if possible where are the new equipment being sent to, i.e. PHL-181 to Battalion level as Artillery company? Brigade level as Artillery battalion that can be broken down into companies and attached to CA Bn?
To answer the first question, the category of a CA Brigade is determined by both the composition of its CA battalions and its vehicles.
A CA Battalion of a HCA Brigade is composed of a Battalion HQ, 2 Armored Infantry Companies, 2 Tank Companies, a Fires Company and a Support & Logistics Company. The vehicles within the Brigade are mostly tracked, this includes the type 05 AAV family. Therefore, Amphibious CABs are considered a sub-category of HCAB (Sometimes denoted AHCAB).
A CA Battalion of a MCA Brigade, on the other hand, is composed of a Battalion HQ, 3 Armored Infantry Companies, an Assault Gun Company, a Fires Company and a Support & Logistics Company. The vehicles within the Brigade is expected to be mostly wheeled using ZBL08 chassis or ZSL92 chassis. There are a few (<10) brigades who are designated MCAB (i.e. they share the same 1+3+1+1+1 structure as other MCABs) but lacks wheeled armor, and therefore has to use obsolete tracked vehicles such as ZSD89, ZTZ59D and ZTZ88B as substitutes. It's expected that these brigaeds will gradually switch into operating wheeled armored vehicles.
A Battalion of a LCA Brigade is composed of a Battalion HQ, 3 Infantry Companies, a Fires Company and a Support & Logistics Company. Note that it does not operate any tanks or assault guns at the battalion level. There are 3 subcategories within LCABs, which are identifyable by the naming of thier battalions: Motorized Infantry, Mountain Infantry and Light-High Mobility Infantry. The former two are pretty self-explanatory. A LCAB composed of LHMI battalions is also known as a "Mengshi Brigade".