As the main way of inheriting traditional Chinese art, oral and heart-to-heart teaching (OAHTHT) has survived in all kinds of art inheritance activities. However, the existing literature fails to provide a clear explanation of the applicability and evolution of OAHTHT in contemporary school music classrooms. This article reports on a project of 'local opera in the classroom' carried out in primary and secondary schools in six regions of Shandong Province from 2017 to 2020. It attempts to research the presentation and evolution of OAHTHT in contemporary music classrooms through classroom observation and semi-structured interviews with teachers and artists participating in the project. Findings show that the change in OAHTHT is not only reflected in the differences of material media, teaching space and spiritual space, but also in the relationship between 'oral instruction' and 'heart to heart teaching'(Xin Chuan): from the past gradual relationship from skill to mind to parallel relationship of mutual subjects. Meanwhile, under the new OAHTHT inheritance mode, a new form of campus opera performance with children as the principal part is taking shape.