Group 1 - The core index of the China Securities Index for domestic renewable energy has shown a recent upward trend, with a 5.75% increase over the past month and a 9.44% increase over the past three months, although it has decreased by 4.60% year-to-date [1][2] - The index comprises 50 sample companies that are significant players in renewable energy production, storage, and electric vehicles, selected based on their business scale and profitability [1] - The top ten weighted companies in the index include CATL (15.28%), Sungrow Power (10.42%), China Nuclear Power (7.45%), and others, indicating a concentration in key industry players [1] Group 2 - The index's holdings are primarily in the industrial sector (72.63%), followed by utilities (20.45%) and materials (6.93%), reflecting the industry's structure [2] - The index samples are adjusted biannually, with changes implemented on the next trading day after the second Friday of June and December, ensuring the index remains relevant [2] - Public funds tracking the index include various ETFs and fund products, indicating a growing interest in renewable energy investments [2]