BY70-1, also known as Bayi kepu weixing 01 xing, is a CubeSat (2U) launched by BAYI/CASTIX on December 28, 2016, from the Taiyuan Satellite Launch Center's LC9 pad using the Chang Zheng 2D launch vehicle. Measuring 0.27 meters in length and diameter with a span of 0.27 meters, it has a dry mass of 10 kilograms and was launched at the same mass. The satellite is equipped with solar cells and batteries for power generation. Its mission focuses on technology demonstration and amateur communication purposes. It is owned by BAYI/CASTIX and manufactured by LINGZ/CASTIX, operating in a box shape configuration.