Employee training is not only important for the continuous growth of human resources but also guarantees sustainable human resource management in enterprises. It is very important to understand corporate behaviour related to employee training not only from the perspective of a single enterprise but also from that of multiple enterprises. The purpose of this study is to explore multiple enterprises' employee training behaviours by conducting a content analysis of corporate social responsibility (sustainability) reports and a social network analysis. This study also seeks to find a way to achieve sustainable employee training by analysing the similarities in the different types of corporate training behaviours. Our analysis shows that, in 2017, 108 types of training activities were implemented by 53 enterprises; the key employee trainings (e.g., security training and skills training) and enterprises (e.g., bank of communication) are identified. The training behaviours of some of the enterprises are similar to some extent, and eight groups of firms that are very similar are identified. The results of this study show that social network analysis performs well for studying corporate employee training behaviours. Some suggestions to minimize the investment costs of training and to improve the sustainability of human resource management from the employee training perspective are provided.Sustainability 2019, 11, 380 2 of 20 organizational sustainability has been highlighted by some scholars [16][17][18]. We therefore explore corporate sustainable resource management from the perspective of sustainable human resource management in this study.Corporate sustainable human resource management is a new area of research and practice [14]. There are still significant research gaps regarding sustainable human resource management, in particular, how human resource management addresses the sustainability of human resources [19]. Only a few studies have examined this issue; for instance, the work by Ehnert [20] explores the meaning of and reasoning for sustainability in human resource management as well as applications of the concept for human resource management through an analysis of 50 European multinational enterprises. Kramar [19] examines the major features of sustainable human resource management and highlights a relationship between sustainability and human resource management. Tooranloo et al. [21] identify the factors that have an impact on the successful implementation of human resource management sustainability in organizations. Human resource management is a series of work practices involving people, among which employee training has a very important part. Some managers and scholars have realized that employee training is not only an important incentive for the continuous growth of employees but also guarantees the sustainable development of the enterprise (e.g., [22][23][24][25][26]). Therefore, it is very interesting and important to analyse the sustainability of human resources from the perspective of employee trai...