In traditional reading class, it is a big challenge for second language learners to read authentic reading materials. This study explored how to use the most popular smartphone application LINE to assist Thai university-level students reading Chinese academic articles in class and after school. In this study, LINE group reading is applied in business Chinese reading class for Chinese major students at Assumption University, Thailand. Also, the study evaluated the effectiveness of using LINE application as a multi-channel reading platform in improving Thai undergraduates' Chinese reading proficiency. The advantages and limitations of using LINE application in business Chinese reading class were also discussed as well. The participants were 16 senior students in Assumption University where the researcher conducted the LINE application reading experiments in Business Chinese class every week. The data were collected by means of the pretest and posttest of reading comprehension, a questionnaire designed by the researcher regarding LINE group reading experiences, informal observation, interview, and the students' feedbacks to LINE application reading experiments. The results indicated that the utilization of LINE application in Chinese reading class offers more opportunities to read extensively and increases the frequency of in & out of the classroom reading activities. The participants enjoy self-selected reading, multimedia reading, and interactive reading in LINE group more than traditional reading class. By demonstrating the possibilities of using the popular social media tool as a foreign language educational tool, this study can serve as a useful reference material for teaching reading in a digital era.