Liu Feixiang,chairman of China Railway Construction Heavy Industry GroupCo.,Ltd and director of the National Enterprise Technology Center, revealed at the Intelligent Manufacturing Branch of the Hunan Academician Advisory and Exchange Promotion Association held IN Nov.16th that Ya’an-Linzhi Section,which has the longest mileage and the most difficult construction in Sichuan-Tibet Railway, has started construction and is currently entering the line survey and design stage. In order to ensure the mechanized and intelligent construction of the Sichuan-Tibet Railway heavy-difficult point project, domestic enterprises are carrying out the front-end technical research of the complete intelligent equipment for tunnel construction.