Full name：2021 the 4th International Conference on Progress in Mechanical and Aerospace Engineering (PMAE 2021)--Scopus, CPCI Abbreviation：PMAE 2021 2021.12.16-18 | Hanoi, Vietnam Official website: http://www.pmae.org Introducation: The aim as well as objective of PMAE 2021 is to present the latest research and results of scientists related to Mechanical and Aerospace Engineering topics. This conference provides opportunities for the delegates to exchange new ideas face-to-face, to establish business or research relations as well as to find global partners for future collaborations. We hope that the conference results will lead to significant contributions to the knowledge in these up-to-date scientific fields. PMAE History: PMAE 2020 was finally held successfully in virtual with much expectation form during December 20-22, 2020 . PMAE 2019 was successfully held in RMIT University, Melbourne, Australia during December 8-10,2019 PMAE 2018 was successfully held in The Hong Kong Polytechnic University during August 10-12, 2018 Publication: After a careful reviewing process, all accepted papers after proper registration and presentation, and all the accepted papers of PMAE will be published in the CMAME Conference Proceedings as a special chapter, which will be indexed by Scopus, Inspec, Conference Proceedings Citation Index—Science (CPCI-S) (Thomson Reuters, Web of Science),et al. Please submit your full paper： http://confsys.iconf.org/submission/pmae2021 Call for Paper: Topics of interest for submission include, but are not limited to: Aerospace Mechatronics and Avionics Systems Advanced theoretical models Advances in aerospace technology Aeroelasticity and loads Aerodynamic's fundamental concepts Aerospace robotics and mechatronics Flight software engineering and testing Aerostructures and composites Aeronautics and astronautics Aircraft systems Aircraft design concepts Applied aerodynamics and fluid mechanics Aviation human factors Computational fluid dynamics More Topics please check: http://www.pmae.org/cfp.html Contact us: Ms. Seven Kang Conference Secretary of PMAE 2021 Tel: +86-18062000004 Email: pmae@saise.org