Pathway of Modern Marine Ranch Industry Chain Extension and Value Chain InnovationTaking Yantai Dongyu National Marine Ranch as an Example

Modern marine ranch plays an important role in improving marine ecological environment and promoting sustainable and healthy development of marine economy．Nowadays, it generally encounters various problems of single industrial pattern, low industrial integration and deficient innovation of industrial chain extension and value chain．An in-depth investigation was conducted on construction and development process of Yantai marine ranch, and path characteristics and existing problems of industrial integration were analyzed using operational status of Yantai Dongyu National Marine Ranch's primary, secondary, and tertiary industries as a case study．It was found that main restricting factors were low utilization rate of equipment platform, insufficient scientific and technological force, backward marketing mode of various formats and unmatched government management system and supporting policies．In view of existing problems, countermeasures and suggestions were put forward, such as coordinated development of land and ocean, optimization of industrial pattern, improvement of management mechanism, strengthening of science and technology empowerment and multi-subject cooperation, in order to provide innovative pattern reference for optimization and upgrading of modern marine pastures．