The construction of the No.1 tunnel in Kachun, a section of china-laos railway, was completed by the China Railway No. 8 Bureau on Nov. 8, 107 days ahead of schedule. No. 2, No.3 and No.4 tunnel were previously completed. After the completion of the Ka’cun No.1 tunnel, all the tunnels named after Ka’cun of China-Laos Railway have been completed.