Soldiers assigned to an army aviation brigade under the PLA 72nd Group Army queue to board a Mi-171 transport helicopter prior to a fast-roping training exercise on September 19, 2020. The aviation brigade and a combined arms unit jointly conduct training subjects including force projection, fast-roping and firepower striking, so as to beef up troops’ cooperative engagement and multi-dimensional defense penetration capabilities. (eng.chinamil.com.cn/Photo by Zhang Huanpeng)