Since 1956 China started the development work of modern rocketry. June 29, 1964, China successfullytested its own design and development of  medium-range rockets, Development of multi-stage rockets started to enter  the space technology. After five years of hard work, April 24, 1970 "long  march on the 1st" rocket birth. the first launch of the "Dongfanghong No.  1" satellite successfully. China’s spacetechnology has taken a major step  forward. Now, the "long march" series of rockets toward the world, a  worldwide reputation in the international launch market occupies an  important seat. "Long march No. 1" is a three-rocket launch vehicles,  mainly for launching small payloads to orbit. Rocket length of 29.8meters  and a maximum diameter of 2.25 meters, takeoff weight of 81.6 tons and 112  tons of take-off thrust. can the 300 kilogram satellite into near-earth  orbit 440 km high. April 24, 1970, the long marchon the 1st rocket to be  "Dongfanghong No. 1" satellite into orbit. lay the foundation for the  developmentof a long march rocket series. "Long march on the 1st D" rocket  "long march No. 1" rocket improved. The main improvements are : raising a  son-class engine; Raise two, three-stage performance; use the 
"platform-computer" all inertial guidance. Improved, "long march on the 1st  D" rocket capable of launching loworbit satellites and has put commercial  launch. "Long march 2" carrier rocket was developed on the basis of China’s  Aerospace Vehicle models. In the "long march No. 1" on the basis of the  technical development of a "long march on the 2nd." "long march on the  3rd," and "long march 4" series carrier. "Long march 2" rocket is a  two-stage rocket, with a full length of 31.17 meters, and a maximum diameter of 3.35 meters. take-off weight is 190 tons, 18,000 tons can send  satellites hundreds of kilometers above the ground and the oval track.  November 26, 1975, the "long march 2" rocket completed China’s first return  satellite launch tasks. Improved "long march on the 2nd C" rocket thrust  using a large liquid-fuel rocket engines. Arrow to 35.15 meters long, to  the near-Earth orbit carrying capacity of 2.4 tons, greatly enhance the  reliability of the rocket. "Long march on the 2nd D" rocket, a two-stage,  liquid-fuel rocket. Mainly in the "long march 2" rocket propellant taken on  the basis of an increase in the volume and increase the take-off thrust,  make further enhance carrying capacity. Rocket 38.3 meters in length and  has a lift-off weight of 232 tons. "Long march on the 2nd E" rocket bundle  is longer, "long march on the 2nd C" for the core level, and the first  level Week