In the Rocket Force, the missile testing major is called the most dangerous major, and the detection environment is often filled with flammable, explosive and even highly toxic substances. Niu Yongchun, the squad leader of a brigade of the Rocket Force, who has been "matched" with dangerous positions for more than ten years, dares not be negligent in every mission. Click the video ↑ to see how Dongfeng courier "takes the pulse" of the magic sword.