Copper wire manufacturing is the upstream industry of conductor cables and wires. Since the setup of its SCR continuous casting and rolling rod plant in 1977 , Walsin Lihwa has been the leader in capacity, quality, and sales across the Taiwan Strait and other areas in Asia, enjoying customers' long-time trust and partnership.

At present Walsin Lihwa produces approx, 650,000 tons of copper rod and 176,000 tons of copper wire per year. Because of the SCR continuous casting and rolling process, products feature high purity and easy processing. Walsin Lihwa not only enjoys the highest cooper wire market share in Taiwan but also is the largest bare copper wire manufacturer in Mainland China due to its powerful Dongguan and Nanjing plants. The company's cross Strait copper wire operations effectively integrate orders and optimize product mixes for aggressive exploration of the markets in Philippines, Singapore, and Thailand over the past few years in addition to sufficing the needs of cable and wire manufacturing in the Greater China region.

Copper wires are widely used in power cables, built-in motor generators for electric devices, communication wires, wiring for computers and electronics, power wires, and decoration lights.