Investment Rating - The report maintains a "Buy" rating for Jinlei Co., Ltd. (300443.SZ) with an expected revenue growth of 41.8% in 2025 and a projected net profit of 409 million yuan [1][7]. Core Views - The company has demonstrated significant growth in both revenue and profit in the first half of 2025, with revenue increasing by 79.85% year-on-year, primarily driven by the substantial rise in shipments of wind power shaft products [2][4]. - The dual-driven strategy of "casting + forging" is expected to enhance profitability as the company continues to expand its market presence both domestically and internationally, particularly in the offshore wind power sector [4][3]. Financial Performance Summary - **Revenue**: Projected revenues for 2025, 2026, and 2027 are 2,789 million yuan, 3,519 million yuan, and 4,119 million yuan respectively, reflecting growth rates of 41.8%, 26.2%, and 17.1% [1][4]. - **Net Profit**: Expected net profits for the same years are 409 million yuan, 569 million yuan, and 713 million yuan, with growth rates of 136.9%, 39.1%, and 25.2% respectively [1][4]. - **Earnings Per Share (EPS)**: The projected EPS for 2025, 2026, and 2027 are 1.28 yuan, 1.78 yuan, and 2.23 yuan, corresponding to P/E ratios of 21.6, 15.6, and 12.4 [1][7]. Business Development Summary - The company has successfully increased its casting capacity and expanded its market reach, establishing strategic partnerships with major global wind turbine manufacturers such as GE and Siemens Gamesa [3][4]. - The growth in the wind power casting business is particularly notable, with sales revenue reaching 280 million yuan in the first half of 2025, a year-on-year increase of 276.06% [3].