In recent years, the products of smart mobile terminals such as smartphones have been continuously upgraded, with increasing levels of thinness, processing performance, display effects, battery life, stability, and multi scenario application capabilities. Under this trend, smart terminal manufacturers have increasingly high requirements for the performance of micro electrical connectors and interconnection system related products. Thinning, dense packaging, high speed, high current, touch control, and energy saving have become mainstream demands for products. Electrical connection technology provides customers in the smartphone industry with the most comprehensive and suitable connector solutions. Given the initial popularity of 5G mobile phones, in the short term, LDS+RF transmission lines will still be the mainstream of 5G mobile phones. With the increase in production and decrease in prices of 5G core chip components, more 5G smartphones utilizing small-sized technology will be introduced to the market.