The study examines whether there is any difference between the effects of a reading–writing integrated task and comprehensive corrective feedback (CF) on English as a foreign language (EFL) learners’ writing development, and whether the input language in the integrated task makes a difference in L2 writing development over time and the language accuracy of the writing resulting from the integrated task. It also explores the possible relationships among language, content alignment and language accuracy and the relationship between language alignment and content alignment. To this end, a quasi-experimental study was conducted to assess participants’ L2 writing development based on a pretest–posttest–delayed-posttest design implemented in four intact EFL freshman classes. Four groups were created: an English-reading–English-writing (EE) group, a Chinese-reading–English-writing (CE) group, a comprehensive CF group, and a control group, which engaged solely in writing practice. The results demonstrated that (1...