Although engineers originally said construction could take until 2015, the China's Ministry of Railways initially promised a 2010 opening date for the new line. However, the Ministry did not anticipate an ensuing debate over the possible use of maglev technology. Although more traditional steel-on-steel rail technology was chosen for the railway, the technology debate resulted in a substantial delay of the railway's feasibility studies, completed in March 2006. The current rolling stock is the CRH380AL, which is a Chinese electric high-speed train that was developed by China South Locomotive & Rolling Stock Corporation Limited (CSR). CRH380A is one of the four Chinese train series which have been designed for the new standard operating speed of 380 km/h (236 mph) on newly constructed Chinese high-speed main lines. The other three are CRH380B, CRH380C and CRH380D.