长城电工：副总经理周济海代行总经理职责

Group 1 - The core point of the article is that Great Wall Electric announced that the board of directors has authorized Deputy General Manager Zhou Jihai to act as the General Manager [2] Group 2 - The announcement was made on the evening of November 7 [2] - This change in management may indicate a shift in company strategy or operations [2] - The decision reflects the company's governance structure and delegation of responsibilities [2]