To sort out some of the Information regarding the 15th Army Corps: One Division is in Henan but two are in Hubei province. The regiment numbers are below as well. It's not realistic to expect such a unit to serve in Tibet as it is not equipped nor trained to be there. Also the entire three Divisions have only one regiment with transport planes also stationed in Hubei province.
Remember the Vietnam War? One single airmobile Division like the 1st Cavalry Division had around 470 helicopters available. We talk here about 1965, exactly 50 years ago. Today a truly airmobile Army Corps would need five or ten times more. On top of that also airports, supply facilities and a few hundred airplanes.
Show me the pictures of even 5% of that in Tibet.
1、空降兵第43师,代号95900部队,驻
河南开封
(1)第127团,代号95985部队,为空降摩步团
(2)第128团,代号95982部队,为空降摩步团
(3)第129团,代号95936部队,为空降炮兵团
43th Airborne Division, Kaifeng, Henan Province
2、空降兵第44师,代号95971部队,驻
湖北广水
(1)第130团,代号95964部队
(2)第131团,代号95918部队,为空降炮兵团
(3)应山场站,代号95832部队,44师师属场站
44th Airborne Division, Guangshui, Hubei Province
3、空降兵第45师,代号95942部队,驻
湖北黄陂
(1)第132团,代号
95963部队,为空降炮兵团
(2)第133团,代号95944部队
(3)第134团,代号95969部队,为空降摩步团
45th Airborne Division, Huangpi (Wuhan), Hubei Province
http://www.baike.com/wiki/中国人民解放军空降兵第15军