1. Al-Jarf, R. S. (2005). The effects of online grammar instruction on low proficiency EFL college Students' achievement. The Asian EFL Journal Quarterly, 7(4), 166–190 https://www.asian-efl-journal.com/main-editions-new/the-effects-of-online-grammar-instruction-on-low-proficiency-efl-college-students-achievement/.
2. Baidu (2021). QQTalk. https://baike.baidu.com/item/QQTalk
3. Chen, C. F. E., & Cheng, W. Y. E. (2008). Beyond the Design of Automated Writing Evaluation: Pedagogical practices and perceived learning Effectivness in EFL writing classes. Lang. Learn. Technol., 12(2), 94–112 http://llt.msu.edu/vol12num2/chencheng/.
4. Chen, S., Nassaji, H., & Liu, Q. (2016). EFL learners’ perceptions and preferences of written corrective feedback: A case study of university students from mainland China. Asian-Pacific Journal of Second and Foreign Language Education, 1(5), 1–17. https://doi.org/10.1186/s40862-016-0010-y.
5. Chwo, G. S. M., Marek, M. W., & Wu, W. C. V. (2018). Meta-analysis of MALL research and design. System, 74, 62–72. https://doi.org/10.1016/j.system.2018.02.009.