Thirty minutes. According to Baidu map query, the distance from Nanjing South Railway Station to Gulou Hospital is 8.5 kilometers, and it takes 30 minutes to drive. Nanjing Gulou Hospital, also known as the Gulou Hospital affiliated to Nanjing University School of Medicine, was formerly a "Christian Hospital" founded by Canadian missionaries William, Edward and McLean (Chinese transliteration "Marin") sent by the Christian Church on 1892, and is also known as "Marin Hospital" among the people. It is one of the earliest western hospitals in China.