[7] Line 3, as all the previous lines, uses Trainguard MT CBTC signal system manufactured by Siemens[8][9] to enhance the safety of the automated, driverless trains.

On 13 March 2017, a post titled Do you still dare to take the Xi'an Metro?

On 15 March, Aokai Cables released a statement that the claims were unfounded and they have filed a police report.

On the same day, the government of Xi'an pledged to investigate the matter.

In the wake of the incident, 8 members of staff from Aokai cables were arrested and disciplinary actions were taken against 122 local officials, including 8 bureau-directors and 58 division heads.