Sustainable development is a widely discussed topic. English language education plays the dominant role in China, but the education of languages other than English (LOTEs) is more important for sustainable development. Based on a case study of German language education, this paper draws SWOT analysis to discuss the current foreign language education in China associated with sustainable development. We find that there are four current trends in the sustainable development of foreign language education in China: promotion of sustainable multilingual education, cultivation of sustainable citizens, integration of cultural values for sustainable development and digitalization for sustainable foreign language education. There are also challenges and new perspectives. A rational and systematic policy of multilingualism should be planned. In order to cultivate sustainable citizens who are able to respond to various global problems, the curricula, teaching materials and examinations for LOTE teaching at secondary schools and universities should be co-designed to work with each other. In order to integrate cultural values effectively, more suitable teaching materials should be developed and published, and teachers need to be trained for practicing these contents in class. Digitization in teaching, research and learning should be promoted.

Online-learning stress poses a significant challenge to the sustainability of higher education. The present study employs mixed methods to propose a conceptual process model that depicts the mechanism of online-learning stress of college students. The result of the qualitative study indicates 11 influential factors of online-learning stress, 10 manifestations of online-learning stress (OS), and three learning performance outcomes of OS (LP) through in-depth interviews with 15 college students. The result of a quantitative study on 159 online surveys implies that the influential factors of online-learning stress could be further categorized into learner competence and commitment (LC), course design reasonability (CD), and social support (SS). In addition, the results of the structural equation model (SEM) confirm the negative impact of LC and CD on OS, as well as OS on LP. However, the negative effect of SS on OS is unsupported. The study contributes to both OS theory development and online-learning and teaching in higher education.