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Then the local strain is dynamically engineered by pressing and releasing the wrinkle apex through an atomic force tip control. This nano-mechanical strain-engineering allows to tune the exciton dynamics and emission properties at the nanoscale in a reversible fashion. In addition, a systematic switching and modulation platform of the wrinkle emission is demonstrated, which provides a new strategy for robust, tunable, and ultracompact nano-optical sources in atomically thin semiconductors.Using cross-sectional and longitudinal data, our