Group 1 - The article discusses different dividend indices in the Chinese stock market, specifically focusing on the characteristics and selection criteria of the Shanghai Dividend Index, the CSI Dividend Index, and the Shenzhen Dividend Index [4][6][7] - The Shanghai Dividend Index and the CSI Dividend Index primarily select stocks based on dividend yield, while the Shenzhen Dividend Index selects stocks based on the scale of dividends distributed [5][6] - The Shenzhen Dividend Index tends to include larger companies with significant dividend payouts, which may not necessarily have high dividend yields, leading to differences in industry distribution and performance characteristics compared to the other two indices [6][7]