13.7 km. Tianjin Longtan Road Postal Savings Bank is a local branch of China Postal Savings Bank, and China Postal Savings Bank was formally established in March 2007, becoming the fifth largest bank in China. Tianjin Longtan Road Postal Savings Bank can take Bus No.30 and Bus No.675 to Future City, with a total distance of13.7km.. Tianjin Future City is a new central compound market jointly developed by Ocean Land and Minmetals Real Estate, covering an area of 6,543,800 square meters and a construction area of 3,280,000 square meters.