What country was Lianyungang, Jiangsu Province when the East China Sea was occupied by six countries? urgent

This question is actually very easy to explain. You know Kong Wangshan in Lianyungang and Haizhou. It was Confucius who went to Kongwangshan by boat to see the sea. In other words, there was no such place as Lianyungang at that time, let alone the East China Sea. Confucius, a native of Lu, can climb Mount Kongwang, indicating that Lianyungang is now Lu's sphere of influence.