1.2万亿超级工程引爆上下游！建材ETF易方达、建材ETF涨停，换手率最高飙到500%！

Group 1 - The core message of the news is the significant market reaction following the commencement of the Yarlung Tsangpo River downstream hydropower project, leading to a surge in various sectors, particularly in water conservancy and hydropower [1] - The construction of the Yarlung Tsangpo River project has a total investment of 1.2 trillion yuan, with an expected cement demand of 20 to 30 million tons during the construction phase, translating to an annual average demand of 1 to 1.5 million tons [5][10] - The construction project has positively impacted related ETFs, with notable increases in the building materials and infrastructure sectors, reflecting strong investor enthusiasm [1][5] Group 2 - The building materials ETF saw significant gains, with the top-performing ETFs including the Guotai Fund Building Materials ETF and the E Fund Building Materials ETF, both reaching near their daily limit [1][3] - The trading volume for the Guotai Building Materials ETF reached an extraordinary turnover rate of 546.51%, indicating high investor interest [1][3] - The top ten weighted stocks in the building materials index include Conch Cement, Beixin Building Materials, and Dongfang Yuhong, which are expected to benefit from the increased demand due to the hydropower project [5][6] Group 3 - The construction of the hydropower project is anticipated to boost China's GDP growth by 0.23 percentage points in the first year, highlighting its macroeconomic significance [10] - The industry is experiencing a shift towards healthier competition, moving away from "involution" and focusing on technological innovation and quality [10] - The overall supply-demand dynamics in the building materials sector are expected to improve, with the industry currently at a low valuation and positioning for potential recovery [10]