on 28 October 2016. The line runs eastward from to . It has 10 transfer stations. The line is long, running through the districts of Nanshan, Futian and Luohu. The line is operated by SZMC (Shenzhen Metro Group). Line 9's color is grey brown. 28 October 2016: – 8 December 2019: – Line 10 Line 10 formerly known as Bantian line runs from Futian Checkpoint in the south to Shuangyong Street in the north, with a length of and a total of 24 stations. Construction began in September 2015 and the line opened on 18 August 2020. The line is operated by SZMC (Shenzhen Metro Group). Line 10's color is pink. 18 August 2020: Futian Checkpoint – Shuangyong Street Line 11 Line 11, also known as the Airport Express, runs from Bitou in the northwest to Gangxia North in the city centre via Shenzhen Bao'an International Airport. Construction began in April 2012 and the line opened on 28 June 2016. Line 11 runs at a higher speed of , however, the current line speed is limited to . The line is operated by SZMC (Shenzhen Metro Group). Line 11's color is maroon. 28 June 2016: Bitou – Futian 28 October 2022: Futian – Gangxia North Line 12 Line 12, also known as Nanbao Line, runs from Zuopaotai East in the southwest to Waterlands Resort East in the northwest. Construction began in 2018 and the line opened on 28 November 2022. Line 12's color is light purple. 28 November 2022: Zuopaotai East – Waterlands Resort East Line 14 Line 14, also known as the Eastern Express, runs from Gangxia North in the city centre to Shatian in the northeast. Construction began in 2018 and the line opened on 28 October 2022. The line is operated by SZMC (Shenzhen Metro Group). Line 14's color is yellow. 28 October 2022: Gangxia North – Shatian Line 16 Line 16, also known as Longping Line, runs from Universiade in the centre of Longgang to Tianxin in the northeast. Construction began in 2018 and the line opened on 28 December 2022. The line is operated by SZMC (Shenzhen Metro Group). Line 16's color is dark blue. 28 December 2022: Universiade – Tianxin Line 20 Line 20 formerly known as Fuyong line runs from Airport North in the north-west to Convention & Exhibition City near Shenzhen World. Construction began in September 2016 and the line opened on