Foreword

The 1 st International Conference on Precision Machinery and Manufacturing Technology 2015 (ICPMMT) was held at Howard Beach Resort, Kenting, Taiwan on May 22-24, 2015. The papers submitted to ICPMMT 2015 were recommended to KEM (EI Compendex) through the peer reviewing process. The 2 nd ICPMMT 2017 was held at Howard Plaza Resort, Kenting, Taiwan on May 19-21, 2017. And the 3 rd ICPMMT 2018 has been taken place in Auckland, New Zealand on 4-8 February, 2018 . After conference, all papers submitted to ICPMMT 2017 and 2018 were recommended to MATEC Web of Conferences, Open-access Journal in Materials science, Engineering and Chemistry (Google Scholar, CAS, EI Compendex, Inspec, DOAJ, Web of Science, Scopus). All papers through the peer reviewing process can be published in MATEC Web of Conferences. The 4 th ICPMMT 2019 was back to Howard Plaza Resort, Kenting, Taiwan on May 24-26, 2019. All papers through the peer reviewing process can be published Key Engineering Materials and IOP: Materials Science Engineering with EI Compendex. This year the 5 th ICPMMT 2020 is back to Crowne Plaza, Auckland, New Zealand on 3-7 February 2020. Some papers through the peer reviewing process can be published in Solid State Phenomena and Journal of Physics: Conference Series with EI Compendex. List of Conference Chair, Steering Committee and Scientific Committee are available in this pdf.