Dr. Ren currently is the principle professor and acting chief engineer at Shanghai Aircraft Customer Service Centre of Commercial Aircraft Corporation of China (COAMC). He has had about 30 years aeronautical engineering working experience, during which he serviced as senior academic for RMIT University (Australia) for more than 12 years, a leading researcher in aerospace industries such as Defense Science and Technology Organization for 18 years, He was in senior manager position of Reliability and Airworthiness Department of Aircraft Design and Research Institute of China, and Aircraft R&D Centre (LA, USA). He is leading the Science and Technology innovation in customer service of COMAC. His major research areas focused on Aircraft Reliability, Safety, and Maintenance etc. Also, he is the advising member of SAE, and contributed to a number of international standards, such as ARP4754 and ARP4761 etc. He was honorably awarded a number of guest professor titles in many universities, such RMIT, NWPU, NUAA, Shanghai Jiaotong University etc. He has completed the supervision of more than 15 PhD student theses, and was invited as keynote speaker in many international conferences, such MRO, CE, AIAA. He is the fellowship of Royal Aeronautical Society and Engineer institute of AustraliaDr. Xi Chen, a graduate PhD student from RMIT University, Australia, and postdoctoral fellowship in Shanghai Aircraft Customer Service Centre of COAMC.Professor, the chief designer of ARJ21 aircraft, and the fellow member of Science and Technology committee of COMAC