Group 1 - The core viewpoint of the article is that Tongnan Co., Ltd. (300855) is expanding the application of its subsidiary's small and medium-sized component products from the aviation sector to other high-end equipment manufacturing fields such as gas turbines, high-speed rail, ships, and petrochemicals [1] Group 2 - The company has indicated that its products are currently primarily used in the aviation industry [1] - There is potential for the company's products to be utilized in various other high-end manufacturing sectors, indicating a strategic expansion of its market reach [1]

Group 1 - The company has a subsidiary that produces small and medium-sized components primarily for the aviation sector, with potential applications in other high-end equipment manufacturing fields such as gas turbines, high-speed rail, shipping, and petrochemicals [2] - The company is actively monitoring industry development opportunities and technological product application scenarios [2]