[3] Line 1 is shown as green on maps, however the band on both sides of the trains is coloured red.
[4] It has since been surpassed by Line 5, but still averages over 1 million passengers per day as of March 2021, despite this number being under COVID measures.
The first section of the line served Luohu to Window of the World, opening on 28 December 2004.
On 15 June 2011, Line 1 was extended from Shenzhen University to Airport East.
[8] The new segment extended the line to 23.622 km (14.678 mi) long[3] and cost 10.606 billion yuan to build.