About MSCIENG2019 2019 4th International Symposium on Materials Science and Engineering (MSCIENG2019) (http://www.mscieng.com/2019/en/home) is a platform for academic communications between specialists and scholars in the fields of materials science and engineering. MSCIENG2019 will be held in Nanjing, China, during Aug. 14-16, 2019. Nanjing is the capital of Jiangsu province and the second largest city in eastern China (after Shanghai). Publication 2019 4th International Symposium on Materials Science and Engineering (MSCIENG2019) accepts original and unpublished papers. Both Full paper and Abstract are welcomed. Full papers accepted by the conference will be published online in the following journals of Science Publishing Group (http://www.sciencepublishinggroup.com). The journals have been indexed and abstracted by WorldCat, CrossRef, Electronic Journals Library, CNKI, Zeitschriftendatenbank, EZB, ResearchBib, Polish Scholarly Bibliography, Wissenschaftszentrum Berlin, etc. International Journal of Materials Science and Applications (IJMSA) http://www.sciencepublishinggroup.com/j/ijmsa ISSN Print: 2327-2635 ISSN Online: 2327-2643 Advances in Materials (AM) http://www.sciencepublishinggroup.com/j/am ISSN Print: 2327-2503 ISSN Online: 2327-252X Science Discovery (SD) http://www.sciencepublishinggroup.com/j/sd ISSN Print: 2331-0642 ISSN Online: 2331-0650