On December 30, 2017, the line's east extension, consisting of 9 stations from Middle Yanggao Road to Caolu, entered operation.

In the early hours of November 7, 2010, at around 1:50 AM, a pressurization incident occurred at Shanghai Jianhua Concrete Pile Co., Ltd., located at 2033 Husong Road.

Following the incident, Hechuan Road Station was temporarily closed to allow authorities to manage the situation, and normal operations resumed at 9:16 AM.

Some critics expressed concerns, arguing that the existing security measures may not be capable of preventing such a violent act.

They pointed out that with millions of passengers using the metro daily, maintaining robust security should be the top priority to safeguard public safety.

They pointed out that while security is crucial, the sheer volume of commuters makes it difficult to implement thorough checks without causing significant delays.

The Shanghai Metro is one of the busiest transit systems in the world, and balancing passenger safety with the need for efficiency is a complex issue.

This debate highlights the ongoing challenge for large urban transit systems like Shanghai’s Metro.