there were disagreements between MOTC and the Taipei City Government over the precise location of the station platform within the Taipei Main Station area; MOTC preferred an elevated platform just north of Taipei Main Station while the city wanted an underground platform just west of the main station, across Chengde Road. The MOTC's elevated platform proposal was less expensive and faster to construct, but the city objected as the platform and track would have obstructed the scenery of the surrounding area. The two sides eventually compromised, agreeing to the underground platform proposal but with the Taipei City Government covering the additional cost. The revised project was approved in September 2004. The Taipei Main Station terminus of the Taoyuan Airport MRT was built under the future Taipei Towers development and was designed by architect Fumihiko Maki. The station itself extends five stories underground. The diaphragm wall is deep and excavation depth was around . Four underground levels were constructed: three for the terminus of the station and one for a parking lot. China Engineering Consultants, Inc. (CECI) won the contract for construction of the Taipei City section of the Taoyuan Airport MRT, including construction of the station and platform at the Taipei terminus, through public appraisal on 8 July 2005. Redevelopment of the area will consist of retail, office, and hotel components. Construction and development The BOHSR of the MOTC oversaw construction, which began in 2006 and was scheduled for completion in 2013 but was plagued by multiple delays. The entire system was budgeted at NT$113.85 billion. Land acquisition for the Sanchong City section totaled and cost NT$1.4 billion, including land and buildings. In addition to tracks and stations, joint development projects have been constructed to boost development around stations. A special industrial zone was planned around the THSR Taoyuan Station area. In April 2011, Kingdom Construction Corp. signed a contract to construct a 16-story residential and commercial building near Linkou Station. Civil engineering The design of core E&M systems (including rolling stock, power supply, signaling, communications, depot equipment, platform screen doors, etc.) and the design and construction of two depots (Qingpu and Luzhu) were awarded as part of a contract worth NT$25.5 billion. Hitachi, in cooperation with Marubeni Corporation and Kawasaki Heavy Industries, won the bid for the E&M systems and signed the contract on 12 January 2006. The groundbreaking ceremony for the power supply system was held on 1