CTI provides testing services for lightning protection devices related to building materials and construction projects. Lightning protection refers to the adoption of certain methods and measures to avoid the harm to the human body and buildings caused by lightning. Lightning is a natural discharge phenomenon. Lightning strikes are natural disasters, which not only cause damage to equipment and housing facilities, but also cause fires and explosions, and may even harm people and animals. Lightning rods, lightning protection cables, lightning protection nets, lightning protection belts, and lightning arresters are all commonly used lightning protection devices. A complete set of avoidance devices include air-termination devices, down conductors and grounding devices, and lightning protection devices need to be tested on a regular basis.