The 35th World Conference on Applied Science, Engineering, and Technology (WCAS-ET 2021) will take place in Ho Chi Minh City, Vietnam on May 27-28, 2021, focusing on technological developments and modern trends. Important dates include early bird registration by March 9, 2021, abstract submission by March 30, and full paper submission by April 15. The conference aims to facilitate collaboration and networking among academics, researchers, and industry professionals in the fields of applied science and engineering.