Shenzhen city has limited specializations in integrated circuit design for single-screen development, pcb circuit boards, various industrial control boards, circuit boards around cars, medical products, artificial intelligence, drive boards, security, small household electricity, power supply, photovoltaics/storage reverses, electric tools, smart chargers, lithium battery protection boards, wireless chargers and other consumer-type pcba development, as well as in the distribution of ic, mos, 2- and 3-tiers, electrons, etc。