Explanation: Seoul Metro is a municipal-owned corporation, not privately-owned, and is controlled by the Seoul Metropolitan Government.

Explanation: Seoul Transportation Corporation was indeed formed on May 31, 2017, through the consolidation of Seoul Metro Corporation and Seoul Metropolitan Rapid Transit Corporation, with the stated goal of more efficiently operating the subway system.

Explanation: While Baek Ho is the Chief Executive Officer, Seoul Metro's headquarters is located in the Seongdong District, not the Gangnam District.

Explanation: The full official name of the corporation commonly known as Seoul Metro is Seoul Transportation Corporation.

Explanation: Baek Ho is identified as the current Chief Executive Officer of Seoul Metro.

Explanation: Seoul Metro is a municipal-owned corporation, with ownership vested in the Seoul Metropolitan Government.

Explanation: Seoul Metro controls the railways and stations that are owned by the Seoul Metropolitan Government.

Explanation: Seoul Metro's financial statements for 2023 indeed show a net income of KRW -5172.8 hundred million, confirming a net loss.

Explanation: The policy in question grants free subway access to seniors aged 65 and over, not 70 and over, which is a key factor contributing to Seoul Metro's financial deficit.

Explanation: The financial data indicates that Seoul Metro has experienced an annual net loss of approximately 1 trillion won since 2020, leading to a cumulative net loss of 14 trillion won.

Explanation: The source indicates that the Korea Railroad Corporation (Korail) is indeed facing a financial problem similar to that of Seoul Metro.

Explanation: In 2023, Seoul Metro's total revenue was KRW 1.8707 trillion.

Explanation: The policy allowing seniors aged 65 and over to ride for free is explicitly stated as a significant financial challenge contributing to Seoul Metro's deficit.

Explanation: Since 2020, Seoul Metro has accumulated a total net loss of 14 trillion won.

Explanation: Seoul Metro's operating income in 2023 was KRW -8452.01 hundred million, indicating an operational loss.

Explanation: A declining birthrate and an aging population are expected to further exacerbate Seoul Metro's public finances, potentially leading to discussions about increasing the age limit for free passes.

Explanation: The Korea Railroad Corporation (Korail) is noted to be experiencing a financial problem similar to that of Seoul Metro.

Explanation: Seoul Metro is indeed the sole operator for lines 2, 5, 6, 7, 8, and 9, and it shares operational responsibilities with Korail for lines 1, 3, and 4, facilitating through-operation.

Explanation: The Seoul Metro-controlled section of Line 1 runs from Cheongnyangni station to Seoul station, not Yongsan station, and includes 10 stations.

Explanation: The total service operation length for Seoul Subway Line 1 is 200.6 kilometers, serving 97 stations, as indicated by the operational data.

Explanation: Seoul Subway Line 2 is accurately described as having a total length of 60.2 kilometers and comprising 51 stations.

Explanation: The Seoul Metro-controlled section of Line 3 indeed operates from Jichuk station to Ogeum station, covering 34 stations and 38.2 kilometers.

Explanation: For service operation, Seoul Subway Line 3 runs from Daehwa station to Ogeum station, not Suseo station, and serves 44 stations.

Explanation: The Seoul Metro-controlled section of Line 4 runs from Danggogae station to Namtaeryeong station, not Sadang station, covering 26 stations and 31.7 kilometers.

Explanation: Seoul Subway Line 5 is accurately described as having a total length of 63.0 kilometers, serving 57 stations, and running from Banghwa station to Hanam Geomdansan or Macheon stations.

Explanation: Seoul Subway Line 6 indeed runs from Eungam station to Sinnae station, covering 39 stations with a total length of 36.4 kilometers.

Explanation: The Seoul Metro-controlled section of Line 7 is accurately described as running from Jangam station to Onsu station, covering 41 stations and a total length of 46.9 kilometers.

Explanation: Seoul Subway Line 8 is correctly stated to run from Amsa station to Moran station, serving 17 stations with a total length of 17.7 kilometers.

Explanation: Seoul Metro fully operates subway lines 2, 5, 6, 7, 8, and 9. Line 5 is among these.

Explanation: The Seoul Metro-controlled section of Line 1 has a total length of 7.8 kilometers.

Explanation: Seoul Subway Line 2 comprises 51 stations.

Explanation: The total length of the service operation for Seoul Subway Line 7 is 60.1 kilometers.

Explanation: Seoul Subway Line 4's service operation runs from Jinjeop or Danggogae stations to Sadang or Oido stations.

Explanation: While the Gimpo Depot is designated for Seoul Subway Line 9, it does not provide heavy maintenance for Line 7. Dobong Depot provides heavy maintenance for Line 6, and Godeok Depot provides heavy maintenance for Line 8.

Explanation: The Gunja Depot serves both Line 1 and Line 2 for maintenance, and the Sinjeong Depot is indeed specifically for Line 2.

Explanation: The 1000 series (I) and 2000 series (I) are listed as retired or withdrawn rolling stock series, not current or active ones. The current active series include the 1000 series (II) and 2000 series (II).

Explanation: The Jichuk Depot provides heavy maintenance for Seoul Subway Line 4.

Explanation: The 3000 series (I) is listed among the retired or withdrawn rolling stock series previously used by Seoul Metro.

Explanation: The Sinnae Depot is designated for Seoul Subway Line 6.

Explanation: The Godeok Depot and Banghwa Depot are designated to serve Seoul Subway Line 5.

Explanation: Seoul Metro is a member of the Community of Metros (CoMET) benchmarking organization, but it is listed under the Asia region, not the European region.

Explanation: Seoul Metro is a member of the Community of Metros (CoMET) benchmarking organization.