北隍城是渤海中庙岛群岛最北端的一个小岛,面积约2.5平方公里,人口不足三千,都从事渔业和海水养殖,海产品畅销国外。但岛上无常规电源,难以保证邮电通讯质量.1983年9月2日,岛上的邮电支局用上了太阳能电源,从而改变了以前用干电池供电和油灯照明的落后面貌。 Beibei City is a small island in the northernmost part of the Bohai Sea in the Miaodao Islands, covering an area of ​​about 2.5 square kilometers and a population of less than 3,000, both engaged in fisheries and mariculture, and seafood is sold well abroad. However, there was no conventional power supply on the island and it was difficult to guarantee the quality of postal and telecommunications communications. On September 2, 1983, the postal and telecommunications branch of the island used solar power, thereby changing the backwardness of the previous use of dry-battery-powered and oil-lamp lighting.