Group 1 - The article highlights the successful cultivation of sea worm grass in saline-alkali land in Hainan, showcasing a green transformation in the local agricultural sector [3][4]. - Sea worm grass is a high-value, salt-tolerant plant that can be consumed fresh or processed, with its oil being a nutritious edible health oil [3][4]. - The cultivation process utilizes seawater for irrigation, which helps purify aquaculture wastewater and addresses nutrient pollution issues [3]. Group 2 - Hainan Haiyu Biotechnology Co., Ltd. has established a breeding base for sea worm grass, covering an area of 170 acres, which includes various specialized facilities [4]. - The estimated yield from planting sea worm grass is about 40 kilograms of seeds per acre, potentially generating over 100,000 yuan in seed income based on current international market prices [5]. - The company plans to develop a range of products using sea worm grass extracts, including health supplements and functional foods, while promoting rural revitalization and sustainable agricultural practices [5].

Core Viewpoint - The articles highlight the importance of utilizing saline-alkali land for sustainable agricultural practices and the protection of marine ecosystems in China, emphasizing the potential of sea cucumbers and mangroves in enhancing ecological balance and economic development [1][2][3][5]. Group 1: Saline-Alkali Land Utilization - China has approximately 1.5 billion acres of saline-alkali land, with plans to develop suitable areas into arable land as outlined in the 2022 Central Document No. 1 [2]. - In Hainan Province, the cultivation of sea cucumbers in saline-alkali areas is being promoted, which does not compete with traditional agriculture for resources [1][2]. - The average salt content in seawater is 3.5%, while sea cucumbers can tolerate salinity levels up to 6.5%, making them suitable for cultivation in saline-alkali soils [1]. Group 2: Marine Ecosystem Protection - The East Zhuhai Port mangrove reserve is the largest and most biodiverse in China, playing a crucial role in coastal ecosystem health [3][4]. - The area has seen significant improvements in environmental conditions and increased mangrove coverage due to protective measures implemented since 2014 [3][4]. - Despite progress, challenges such as habitat degradation and biodiversity loss remain, necessitating ongoing efforts for ecological restoration and protection [4][5]. Group 3: Marine Ecological Monitoring - China's marine ecological status is generally stable, with no significant changes in key water quality indicators, although threats from climate change persist [5][6]. - The Ministry of Natural Resources has developed a comprehensive monitoring network to assess marine ecosystems, focusing on areas like coral reefs and seagrass beds [6]. - There is a need for improved spatial planning and management of coastal and nearshore areas to enhance marine ecological protection [6][7].

Core Viewpoint - The article highlights the significant growth of China's marine economy, projected to exceed 10 trillion yuan in 2024, emphasizing the harmonious coexistence of economic development and ecological protection in marine industries [1][12]. Marine Economy Development - China's marine economy is experiencing robust growth across various sectors, including marine fisheries, manufacturing, services, and emerging industries, contributing significantly to national economic growth [1][12]. - In Hainan, the marine production value is expected to grow by 10.4% in 2024, accounting for 34.1% of the regional GDP, driven by technological and industrial innovation [12]. Innovative Agricultural Practices - The cultivation of salt-tolerant crops, such as "sea worm grass," in saline-alkali land demonstrates an innovative approach to utilizing coastal areas for agriculture, promoting both economic and ecological benefits [2][5]. - The economic value of sea worm grass is substantial, with stable income of approximately 50,000 yuan per acre, while also contributing to environmental restoration by filtering nutrients from aquaculture [2][5]. Marine Engineering Materials - Research on long-lasting engineering materials is crucial for marine activities facing harsh conditions, with a new national laboratory established to address material corrosion issues that result in significant global economic losses [6][8]. - The laboratory aims to develop materials that can withstand the unique challenges of tropical marine environments, enhancing the durability of marine equipment [6][8]. Ecological Restoration Efforts - The Hainan Dongzhai Port National Nature Reserve, the largest mangrove area in China, is undergoing comprehensive ecological restoration, balancing protection and development [8][9]. - Increased public awareness and community involvement have led to improved biodiversity, with the number of bird species in the reserve rising from 185 to 230, indicating successful ecological recovery [9].