Weapons and equipment used in the “Safe Environment” event are developed and manufactured by the host China; therefore, the Vietnamese contingent did not have any specific and in-depth documents about them. Right after receiving the weapons and equipment, the contingent’s technical experts quickly learn their techno-tactical features, make comparison with the equipment used in Vietnam, and discuss optimal use of them with the athletes. In the picture: A technical expert is explaining the features and operation of a radiation reconnaissance device.