Shenzhen Metro Line 3 Operation Branch announced yesterday that Longgang Line (Line 3) would add shuttle trains between Tangkeng (塘坑) and Huaxin (华新) from Jan 21, 2013 to release the operation stress during rush hours.
The passenger flow is not even and mainly focus on rush hours in sections between Danzhutou (丹竹头) and Laojie (老街), which occupies about 62.8% passenger flow of Longgang Line. If you have ever taken the longgang line during the rush hours, you must share this same experience – seeing two to four runs of trains leave before you could squeeze into a fully packed one.