TITLE: GCN CIRCULAR NUMBER: 28180 SUBJECT: GRB 200729A: Nanshan/NEXT optical upper limit DATE: 20/07/30 23:10:38 GMT FROM: Dong Xu at NAOC/CAS Z.P. Zhu, D. Xu, X. Liu, S.Y. Fu (NAOC), X. Gao (Urumqi No.1 Senior High School), X. Zhang, J.Z. Liu (XAO) report: We observed the field of GRB 200729A (Evans et al., GCN 28165) using the NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained 10x100s frames in the Sloan r-band, starting at 15:51:05 UT on 2020-07-30, i.e., 20.22 hr after the burst. No optical source is detected in our stacked image at the enhanced XRT position (Osborne et al., GCN 28168), down to a limiting magnitude of r~20.2, calibrated with the nearby PanSTARRS field.