“…It is typical of student-centered L2 teaching and learning settings and often used in higher education (Wang, 2016;Ion et al, 2016 (O'Mahony et al, 2013;Wei, 2015), internalization of grammatical knowledge (Zhang, 2016) or better performance on content and linguistic performance (Zhou, 2013). Benefits from peer feedback are found to agree upon alleviation of anxiety, enhancement of self-regulated learning capability and critical thinking competence, increase of peer interactions and active participation, and improvement of overall writing skills (Tsui & Ng, 2000;Cai, 2011;Yu, 2013;Zhou, 2013;Forrer et al, 2015;Wei, 2015;Wang, 2016;Ion et al, 2016;Zhang, 2016). In the meantime, problems are also detected from peer feedback: lack of trust or self-confidence (Xu & Ye, 2014;Wei, 2015;Wang, 2016), impact of face culture that hinders peers giving negative comment (Wei, 2015;Wang, 2016;Xin, 2016), insufficient L2 knowledge (Xu & Ye, 2014;Wang, 2015;Xin, 2016), inadequate ability to implement assessment rubrics (Wei, 2015;Xin, 2016), critical thinking deficiency and incomplete, less-reliable feedback (Bai, 2012;Zhou, 2013;Wang, 2015;Li & Ye, 2016;Wei, 2016;Xin, 2016), all the weaknesses impairing its efficacy.…”