It was reported (January 2012) that the first sub-orbital flight of a new unmanned spacecraft (Divine Dragon) took place successfully in 2011 onboard a rocket booster. The spacecraft is thought to be similar to American X-35B in configuration but smaller. It has been developed by the 611 Institute. The latest news (September 2015) suggested that an unmanned "hypersonic cruising vehicle" (~Mach 4) featuring a turbojet/ramjet combined cycle engine (TBCC) was tested for the first time after being released from an H-6 carrier. After the hypersonic flight the HCV returned to the base and landed safely. Another HCV was also developed by the 611 Institute and is expected to enter the service as a strategic reconnaissance UAV in the next few years. The latest satellite image (June 2018) indicated that a triangular shaped HCV prototype/technology demonstrator has been built. It was rumored to have been developed by the 611 Institute.