Hanjie Tan (Institute of Astronomy, National Central University), Mi Zhang, Guoyou Sun, Jingyuan Zhao (Xingming Observatory), Quanzhi Ye , Xing Gao (Xingming Observatory), report ~3.4 mag outburst in a known variable star ( 16.87 r ) which is 20.31 rmag in Pan-STARRS DR1 catalogue. 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 Mar. 22.79812, 2021 UT using a unfiltered CCD ( 0.3-m f/3.6 reflector ). Images can be found at: http://xjltp.china-vo.org/xm63ht.html
XM63HT C2021 03 22.79812 18 00 48.93 +52 32 34.8 16.87 r N88
XM63HT C2021 03 22.81516 18 00 48.96 +52 32 34.7 16.87 r N88
*Known VS CSS 121025:180049+523235
