Group 1 - The core viewpoint of the article highlights the strong performance of power grid equipment stocks, with Wangbian Electric reaching a trading limit increase, and Yinen Power rising over 10% [1] - Other companies in the sector, including Sanbian Technology, TBEA, Zhiyang Innovation, and Baobian Electric, also experienced gains [1] - The National Grid Corporation is expected to invest 4 trillion yuan in fixed assets during the 14th Five-Year Plan period, representing a 40% increase compared to the previous plan [1]