港鐵公司
Line 4 formerly known as the Longhua line runs northward from Futian Checkpoint to Niuhu. Trains operate every 2.5 minutes at peak hours and every 6 minutes during off-peak hours. Stations from Futian Checkpoint to Shangmeilin Station are underground. The line has been operated by MTR Corporation (Shenzhen), a subsidiary of MTR Corporation, since 1 July 2010. Line 4's color is red.