With the rapid popularization of 5G technology, the communication industry is growing rapidly and driving the continuous growth of demand for communication network technology services, which brings new development opportunities for the communication network technology service industry. Chongda has become a supplier to major communication giants in China and even globally, with a reputation for high-quality, reliable, and stable products. We have accumulated rich experience in high and multi-layer, high-frequency antenna, high-speed plate, optical module, thick copper, buried copper block, back drill, and back plate production. We have professional research on signal integrity and impedance control, and have the ability to independently test.