This paper reports a study in a technology-assisted Chinese teaching context where one major teaching objective is to encourage international students to participate in speech contests with the theme of 'Tell China, Tell Your Stories'. Results showed that through four weeks' preparation, all the students had a more robust method for presentation delivery and video making than before the project. Moreover, meeting conventional presentation standards was not only an issue of 'language learning', but also an issue of identity construction and negotiation. Finally, all participants had constructed positive ecocultural identities which encouraged respect for individuals, collaborative working, and a sustainable society. [For the complete volume, "Intelligent CALL, Granular Systems and Learner Data: Short Papers from EUROCALL 2022 (30th, Reykjavik, Iceland, August 17-19, 2022)," see ED624779.]