The LM-3C/Yuanzheng 1 launch vehicle conducted its maiden flight on March 30 successfully.The new member of the LM-3A rocket family is a four-stage rocket with 3 lower stages based on LM-3C rocket but an upper stage,whose technical state changes the most compared with the other members of the family.The LM-3A rocket family steps into the 3.0 era. The LM-3C / Yuanzheng 1 launch vehicle conducted its maiden flight on March 30 successfully. The new member of the LM-3A rocket family is a four-stage rocket with 3 lower stages based on LM-3C rocket but an upper stage, whose technical state changes the most compared with the other members of the family. LM-3A rocket family steps into the 3.0 era.