In the past few years, group activities have been warmly welcomed by EFL (English as a foreign language) classes in Chi?na, but few studies have discussed it from a critical perspective. Thus, this study explores from students'experiences what and why the strengths and weaknesses of group work in actual contexts appear. The findings reveal that Chinese learners regard group work as an effective interactive activity for language, personal, and emotional development. However, the possible pitfalls, such as pseu?dogroups, unequal participation, groupthink, L1 (first language) influence may prevent learners from obtaining the benefits of CL (collaborative learning). Finally, some suggestions are given, with the purpose of creating a more suitable facilitative EFL classroom environment for future Chinese EFL teaching and learning.