四维图新今日大宗交易折价成交54.2万股，成交额512.73万元

Group 1 - The core point of the news is that Siwei Tuxin executed a block trade of 542,000 shares on February 12, with a transaction value of 5.1273 million yuan, representing 0.91% of the total transaction volume for that day [1][2] - The transaction price was 9.46 yuan per share, which is a discount of 10.08% compared to the market closing price of 10.52 yuan [1][2] Group 2 - The buyer of the shares was Guosen Securities Co., Ltd., while the seller was Shenwan Hongyuan Securities Co., Ltd. [2]