Smart Dragon-1 launch vehicle launched three satellites from the Jiuquan Satellite Launch Center, Gansu Province, northwest China, on 17 August 2019, at 04:11 UTC (12:11 local time). Smart Dragon-1 (SD-1, also known as Lightning Dragon No.1, Jielong-1, 捷龙一号) is a new solid-propellant rocket developed by the China Rocket Co. Ltd. affiliated to the China Academy of Launch Vehicle Technology (CALVT). According to official sources, SD-1 has a total length of 19.5 meters, a diameter of 1.2 meter, a takeoff weight of about 23.1 tonnes and is capable of sending 200 kg payloads to a Sun-synchronous orbit with at an altitude of 500 km.