水泥板块9月19日涨2.04%，天山股份领涨，主力资金净流入4.1亿元

Group 1 - The cement sector experienced a rise of 2.04% on September 19, with Tianshan Co. leading the gains [1] - The Shanghai Composite Index closed at 3820.09, down 0.3%, while the Shenzhen Component Index closed at 13070.86, down 0.04% [1] - Key stocks in the cement sector showed significant price increases, with Tianshan Co. rising by 7.50% to a closing price of 6.74 [1] Group 2 - The cement sector saw a net inflow of 410 million yuan from main funds, while retail funds experienced a net outflow of 180 million yuan [2] - Major stocks like Xizang Tianlu and Tianshan Co. had notable net inflows from main funds, indicating strong institutional interest [3] - Conversely, stocks such as Sichuan Jinding and Jinyu Group faced significant net outflows from retail investors, reflecting a lack of confidence among smaller investors [3]