三未信安龙虎榜：营业部净买入2351.56万元

Group 1 - The closing price of Sanwei Xinan (688489) on August 21 was 51.70 yuan, reaching the daily limit with a trading volume of 2.55 billion yuan and a turnover rate of 10.07% [1] - The stock was listed on the daily trading list due to a price increase of 15% at the close [1] - The top five trading departments accounted for a total transaction of 91.86 million yuan, with a net buying amount of 23.52 million yuan [1] Group 2 - The largest buying department was Dongfang Securities, with a purchase amount of 14.43 million yuan, followed by Huaxin Securities with 11.47 million yuan [1] - The selling department with the highest amount was Industrial Securities, selling 18.46 million yuan, while a specialized institutional seat sold 4.16 million yuan [1] - Overall, the stock experienced a net inflow of 51.23 million yuan from main funds on that day [1]