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When was the complete tutorial of New Oriental New Concept recorded by Qu Huizhen and Li Yanlong recorded?

2019. New Oriental New Concept English Volume 1 Complete Tutorial*** 144 episodes, recorded in 2019 by New Oriental teachers Qu Huizhen and Li Yanlong, focusing on the content of New Concept English Volume 1, explaining the knowledge points of each unit in detail, suitable for those with no basic knowledge, Used by beginners and students who want to consolidate their basic skills.