Now, the Yungch'un tunnel of the Peihuei line, for example, is 4,020.5 meters long, twice the length of the Ts'aoling tunnel--and it is only the third longest on the island.
以北回線上排名第三的「永春隧道」來說，全長四○二○．五公尺，是「草嶺隧道」的兩倍。