Hanjie Tan (Institute of Astronomy, National Central University), Mi Zhang, Guoyou Sun, Jingyuan Zhao (Xingming Observatory), Quanzhi Ye , Xing Gao (Xingming Observatory), report >4.3 mag outburst in a variable star candidate (13.90 G). The transient was discovered on several 120-s survey images (limiting mag about 18.0) taken by Xing Gao at Xingming Observatory #3 (N88) around Aug. 11.90343, 2021 UT using a unfiltered CCD (0.3-m f/3.6 reflector). Images can be found at: http://xjltp.china-vo.org/xm69ht.html
XM69HT C2021 08 11.90343 05 44 52.27 +33 30 09.8 13.90 G N88
