Core Perspective - The article emphasizes the significance of oceans in shaping human civilization and their role as a vital resource for economic development and sustainability [2][4]. Group 1: Ocean's Historical and Scientific Significance - The book "Eighteen Lectures on Ocean Culture" explores the origin and evolution of oceans, detailing their transformation from the primordial "magma ocean" to the current vast blue world [3]. - Ocean studies encompass various phenomena, including the composition of seawater, waves, tides, and currents, which are crucial for understanding natural mysteries and climate regulation [3]. - The ocean has been a cradle for life, witnessing significant evolutionary milestones over nearly 4 billion years, including the emergence of multicellular organisms and the ancestors of terrestrial vertebrates [3]. Group 2: Economic and Cultural Impact of Oceans - Oceans serve as a foundation for human survival and development, facilitating global connectivity and economic prosperity through trade and tourism [4]. - The ocean economy is a critical component of global economic growth, providing numerous job opportunities and driving sustainable development [4]. - The rise of technologies such as artificial intelligence and IoT enhances the efficient development of ocean resources, including renewable energy [4]. Group 3: Challenges and Sustainable Development - The ocean faces significant challenges, including pollution, overfishing, and coastal wetland destruction, which threaten ecological balance [4]. - There is a shift towards a sustainable blue economy, supported by blue finance and digital technologies, aiming for harmonious coexistence between oceans and human society [4]. - International treaties and regional agreements are essential for maintaining peace and stability in ocean resource management [4]. Group 4: Educational Value - "Eighteen Lectures on Ocean Culture" serves as a comprehensive textbook for undergraduate students, integrating knowledge from history, culture, economics, law, and modern science to enhance understanding of the ocean's relationship with human society [5].

Group 1 - The article emphasizes the significance of the ocean in shaping human civilization and its role in development, connectivity, and life on Earth [1] - It highlights China's unique position as a country with both land and sea civilizations, and the historical integration of marine culture with agricultural and nomadic cultures [1] - The publication "Marine Culture Eighteen Lectures," edited by Academician Dai Minhan, aims to systematically introduce marine knowledge and culture, emphasizing the ocean's profound impact on human society [1] Group 2 - The article discusses the evolution of marine observation and research methods, illustrated by the search for the Titanic wreck and the successful descent of the "Fendouzhe" manned submersible in the Mariana Trench [2] - It addresses the economic value of the ocean, from fishing to tourism, and the concept of "sustainable blue economy" in the context of global challenges [2] - The book aims to enhance understanding of marine culture and values, fostering interdisciplinary thinking and global perspectives to inspire innovation and proactive engagement with the ocean [2]