11000亿元！央行，大动作！

Group 1 - The People's Bank of China conducted a reverse repurchase operation of 1.1 trillion yuan with a term of 3 months (91 days) to maintain liquidity in the banking system [1] - The operation was carried out using a fixed quantity, interest rate bidding, and multiple price level bidding methods [1] Group 2 - The article mentions various market reactions and announcements, including significant changes in stock holdings and market volatility [1] - There are references to other news events that may impact the market, such as geopolitical developments [1]