Propellants
Long March 1's 1st and 2nd stage uses HNO3 and UDMH propellants, and its upper stage use a spin-stabilized solid rocket engine.
Long March 2, Long March 3, Long March 4, the main stages and associated liquid rocket boosters use dinitrogen tetroxide as the oxidizing agent and UDMH as the fuel. The upper stages (third stage) of Long March 3 rockets use YF-73 and YF-75 engines, using Liquid hydrogen (LH2) as the fuel and Liquid oxygen (LOX) as the oxidizer.
The new generation of Long March rocket family, Long March 5, and its derivations Long March 6, Long March 7 will use LOX and kerosene as core stage and liquid booster propellant, while LOX and LH2 in upper stages.
Read more about this topic: Long March Rockets