Chang Zheng   CZ-7

China National Space Administration * China Academy of Launch Vehicle Technology (CALT) * China Aerospace Science and Technology Corporation (CASC)

The CZ-7 is the medium-lift variant in China’s new-generation orbital launch vehicle family. The core vehicle of the CZ-7 is a two-stage rocket 3.35m in diameter. The first-stage uses a K3-1 module powered by two YF-100 engines burning the LOX/Kerosene propellant. The second-stage uses a K3-2 module powered by four YF-115 engines that also burn the LOX/Kerosene propellant. The vehicle can be attached with two or four 2.25m-diameter K2-1 modules as strap-on boosters, each powered by a single YF-100 engine.
The YF-100 has staged combustion, Chinese industry officials say, referring to a challenging but efficient technology. The engine has achieved a 305-sec specific impulse, a key measure of efficiency, they add. The 18-ton-thrust second-stage engine of Long March 7, which may be named YF-115, has been revealed as using staged combustion.
The CZ-7 is expected to succeed the CZ-2F for the launch of Shenzhou spacecraft and the unmanned cargo resupply ship to the space station. It is also likely going to replace all existing medium-lift launch vehicles such as CZ-2C, CZ-2D, CZ-3A/B/C, and CZ-4B/C for LEO, GTO and SSO launch missions.
The launch vehicle will be available in both man-rated and cargo versions. The man-rated version will be capable of delivering 12,500 kg payload to LEO. The cargo version will be capable of delivering 13,500 kg payload to a 400x200km LEO inclined at 42°, or 5,500 kg payload to a 700km SSO.

2016, June 21 -- CZ-7 maiden launch

The DFFC (Duoyongtu Feichuan Fanhui Cang) is subscale model of a future Chinese manned space capsule.
Reportedly outfitted with basic systems like a navigation system, heat shield, parachutes and a communications system capable of transmitting through the plasma occurring during the hypersonic re-entry sequence.
It was launched on the maiden flight of the CZ-7/YZ-1A rocket. It remained attached to the YZ-1A upperstage with the ZGZ Shiyan Zhuangzhi. The upper stage provided also the reentry manouevre for the DFFC capsule.
The DFFC capsule successfully returned to earth on 26 June 2016.

The ZGZ Shiyan Zhuangzhi (Zai Guijia Zhu Shiyan Zhuangzhi) or In-Orbit Refeuling Experimental Device is a fluid-transfer experiment launched by China's new generation CZ-7/YZ-1A launch vehicle in 2016.
The experiment is mounted on the YZ-1A upper stage and remains attached. After the experiments, it is to deorbited with the upper stage.