4月20日,南部战区海军航空兵某旅开展跨昼夜飞行训练,锤炼部队作战能力。卓灵鹏 摄
A fighter jet attached to an aviation brigade with the navy under the PLA Southern Theater Command takes off for a round-the-clock training exercise on April 20, 2021. (eng.chinamil.com.cn/Photo by Zhuo Lingpeng)