泓淋电力：公司已与部分大型客户签订铜价联动模式的销售合同，因此铜价波动对公司利润影响较小

Group 1 - The core viewpoint of the article is that the impact of rising raw material prices, such as copper and aluminum, on the company's profit margins is minimal due to existing contracts with major clients that incorporate copper price linkage [2]. Group 2 - The company, Honglin Electric (301439.SZ), has signed sales contracts with some large customers that mitigate the effects of copper price fluctuations on its profits [2].