国有大型银行板块1月20日涨0.78%，中国银行领涨，主力资金净流入7.21亿元

Group 1 - The core viewpoint of the news is that the state-owned large bank sector experienced a rise of 0.78% on January 20, with China Bank leading the gains [1] - The Shanghai Composite Index closed at 4113.65, down 0.01%, while the Shenzhen Component Index closed at 14155.63, down 0.97% [1] - The trading performance of individual stocks in the state-owned large bank sector showed varied results, with China Bank closing at 5.44, up 1.49%, and Agricultural Bank at 7.17, up 0.99% [1] Group 2 - The net inflow of main funds into the state-owned large bank sector was 721 million yuan, while retail investors saw a net outflow of 177 million yuan [1] - The detailed fund flow for individual banks indicated that Agricultural Bank had a net inflow of 210 million yuan from main funds, while it experienced a net outflow of 140 million yuan from speculative funds [2] - Industrial and Commercial Bank had a net inflow of 181 million yuan from main funds, but a significant net outflow of 254 million yuan from speculative funds [2]