炼化及贸易板块1月28日涨2.34%，泰山石油领涨，主力资金净流入2.36亿元

Group 1 - The refining and trading sector increased by 2.34% on January 28, with Taishan Petroleum leading the gains [1] - The Shanghai Composite Index closed at 4151.24, up 0.27%, while the Shenzhen Component Index closed at 14342.9, up 0.09% [1] - Key stocks in the refining and trading sector showed significant price increases, with Taishan Petroleum rising by 6.84% to a closing price of 8.12 [1] Group 2 - The refining and trading sector saw a net inflow of 236 million yuan from main funds, while retail investors experienced a net outflow of 702 million yuan [2] - Major stocks like Guanghui Energy and China Petroleum had varying net inflows and outflows, indicating mixed investor sentiment [3] - Taishan Petroleum had a net inflow of 53.70 million yuan from main funds, but a significant outflow of 777.49 million yuan from retail investors [3]