Group 1 - The Shanghai Stock Exchange's Sci-Tech Innovation Board semiconductor materials and equipment index fell by 1.62% as of September 25, 2025, with mixed performance among constituent stocks [1] - The Sci-Tech Semiconductor ETF (588170) decreased by 1.75%, with the latest price at 1.46 yuan, while its trading volume was active with a turnover of 18.85% and a total transaction value of 267 million yuan [1] - The latest scale of the Sci-Tech Semiconductor ETF reached a new high of 1.43 billion yuan, with the number of shares also hitting a record of 967 million [1] Group 2 - According to data from SEMI, global silicon wafer shipments in Q2 2025 reached 3.327 billion square inches, marking four consecutive quarters of year-on-year growth and the highest level since Q3 2023 [2] - The semiconductor equipment and materials industry is a key area for domestic substitution, benefiting from the expansion of semiconductor demand driven by the AI revolution and advancements in lithography technology [2] - The Sci-Tech Semiconductor ETF (588170) and its linked funds focus on semiconductor equipment (59%) and materials (25%), indicating a strong emphasis on the upstream semiconductor sector [2]