Overview of TDRs on 2020 November 10. Panels a and b: NVST Hα image and HMI magnetogram displaying a TDR in the chromosphere and its corresponding photospheric magnetic environment, respectively. Panels c–e: Hα images showing TDRs r1, r2, and r3 appearing at different times in the region enclosed by the blue rectangle. The yellow curves in panels a and b denote the contours of r2. The yellow curves in panels c–e denote the contours of three TDRs.