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Welding method: 1. Place the LED lamp beads in the order of positive and negative poles, and scrape off the paint surface of the insulating layer at the beginning and end to expose the copper 2. Connect end to end, connect the positive electrode of the former one and the negative electrode of the latter one in turn, weld the wires and connect them in series; they can also be connected in parallel according to the voltage you need, and you can weld them.