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Group 1: Xi'an Yicai (688783.SH) - Xi'an Yicai is a leading manufacturer focused on the research, production, and sales of 12-inch silicon wafers, ranking first in China and sixth globally in terms of monthly shipment volume and production capacity by the end of 2024 [1][3] - The company has established its first core manufacturing base in Xi'an, with the first factory reaching production capacity in 2023 and a second factory set to commence production in 2024, aiming for full capacity by 2026 [3] - By the end of 2024, the company's combined production capacity is expected to reach 710,000 wafers per month, capturing approximately 7% of the global market share for 12-inch silicon wafers [3] - Xi'an Yicai has become a key supplier for major domestic logic wafer foundries and storage IDM manufacturers, holding a leading position in supply volume among global 12-inch silicon wafer suppliers [3] - The company has applied for a total of 1,635 patents, with over 80% being invention patents, making it the largest holder of authorized invention patents in the 12-inch silicon wafer sector in mainland China [4] Group 2: Changjiang Nengke (920158.BJ) - Changjiang Nengke specializes in the design, research, manufacturing, and service of energy and chemical equipment, recognized as a national-level "specialized and innovative" small giant enterprise [5][6] - The company’s main revenue sources include electric desulfurization equipment and other energy chemical equipment, with electric desulfurization contributing 64.80% of revenue in 2024 [7] - Changjiang Nengke has established itself as a leading supplier in the electric desulfurization market, holding the top market share in China from 2021 to 2023 [7] - The company has received multiple technology advancement awards and certifications for its products, including recognition for its contributions to complex oilfield engineering projects in the Middle East [7] - The gross profit margins for the company have fluctuated significantly, with rates of 48.15%, 32.19%, and 41.17% from 2022 to 2024, indicating potential risks related to pricing and cost pressures [8]