“…In terms of writing research, some experts (e.g., Prior, 2001Prior, , 2006Russell, 1995Russell, , 1997Villamil & de Guerrero, 1996) pay more attentions on the application of mediation analysis and Activity Theory. According to Activity Theory, Lei (2008Lei ( , 2012 argued that writing strategies are "mediated actions which are consciously taken to facilitate writer's practices in communities" (Lei, 2008, p.220) and identified four types of writing strategies by drawing on the Activity Theory. They are artifact-mediated, rule-mediated, role-mediated and community-mediated strategies.…”