The quality of doctoral training has been a hot topic of research with increased attention to doctoral education.By taking research opportunity as a mediating variable,this study investigates the impact of the training system and environment on the quality of doctoral training.Results show that the training system and conditions have a positive impact on the quality of training.Among various dimensions of the training conditions,the academic environment,faculty,and research conditions have significantly positive effects on the training quality while the effects of material and teaching conditi...