1. welding method: suitable for thin copper wire. Use solder wire or solder paste to coat a certain amount of solder on the joint of phosphor copper wire and thin copper wire. Use a soldering iron to heat the solder so that it melts and contacts the phosphor copper wire and thin copper wire. After the solder cools and solidifies, the welding is completed.

2. Pressure welding method: it is suitable for occasions requiring strong welding connection. Placing phosphor copper wires and fine copper wires on a metal fixture in a cross way. Heating the metal fixture with a soldering iron generates enough heat and pressure to heat and press the phosphor copper wire and the fine copper wire together. After waiting for the metal to cool, the welding is completed.