BEIJING, June 8 -- Recently, a cross-regional parachuting training aiming to temper the troops' capability in long-range penetration and in-depth strike was conducted in areas spanning from the plateau with an altitude of over 3,700m to plain with an altitude of less than 100m, involving forces from a special operations brigade under the PLA Xizang Military Command , and the PLA Air Force's transport aircraft including Y-20 and IL-76.