The Biyang Electronic Factory is a new (game v0.7.19) industrial site in northern Biyang on Oji Island, across the bridge from Seongsan. It is the electronics link in Oji's copper chain.
Production
It takes Plastic Pallet and Copper Rod Coil (refined from Copper Ore via the Gwangjin Copper Concentrator and Copper Refinery) and produces Circuit Board Pallets, which in turn feed the Transformer Factories. See the live inputs and outputs on the Freight pages — per-cycle quantities are still being verified in-game.