China's Second Great Wall Along the Sea (IMAGE) Michigan State University Caption To create more land for development, China has constructed a new 'Great Wall' -- a seawall covering more than 50 percent of the total length of coastline along mainland China. Credit <i>Science</i> Usage Restrictions With credit to <i>Science</i> License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.