court convicted him for the crime of a major liability accident which has a fixed-term imprisonment of two years and six months and a probation of three years. The project director representative has a fixed-term imprisonment of six-month with a probation period of two years. The general contractor’s project manager for two years with a fixed-term imprisonment of one year and six months. At unbalanced subsidence was discovered. From January 22 to January 28, 2012, it was closed for an overhaul. Stations Service routes Important stations : Interchange with line 3. To transfer to line 1, passengers need to exit through a tunnel inside Shanghai railway station and purchase a ticket to re-enter the station. : Interchange with lines 2 and 3. : Interchange with lines 2, 6 and 9. It is Shanghai's first 4-line interchange station. : The first platform-to-platform interchange station in the Shanghai Metro network. Interchange with line 8. : Serves Shanghai Stadium. : Serves the sports stadium of the same name and the biggest regional and interregional bus station in the city. Interchange with line 1. : Serves East China Normal University. Interchange with lines 3 and 13. : Serves Donghua University. Future extensions There are abandoned plans to end the shared tracks with line 3. Plans include a new underground track for line 4 on the northwestern past. Station name change On 28 October 2006, Dongfang Road was renamed as the after station renovation for line 2 and the opening of line 4. Headways <onlyinclude> Technology Signaling Lines 3 and 4 has been operating over capacity due to large passenger flows for a number of years. With the continuous extensions of operating time, the problems of aging equipment and increasing passenger demand will further increase the operating pressure of the two lines. In June 2021 it was announced that Shanghai Metro has started to update of the signal system of lines 3 and 4 and finish before December 31, 2024. These are the last lines in the system that are equipped with fixed block Alstom URBALISTM 200 system, not equipped with CBTC systems capable of headways as low as 90 seconds. CASCO successfully won the bid for the renewal and transformation of the signaling for lines 3 and 4 using its self-developed Qiji TACS system. Rolling Stock Former Rolling Stock References Shanghai Metro lines Railway loop lines Railway lines opened in 2005 2005 establishments in