Complex sentence: Nanjing Metro's Nanjing South Railway Station offers cross-platform interchange between Lines 1 and 3 and single direction cross platform interchange between Line S1 and Line S3.
Split into simpler sentences: Nanjing Metro's Nanjing South Railway Station offers cross-platform interchange between Lines 1 and 3. In addition, a single direction cross platform interchange is also available at Nanjing South between Line S1 and Line S3.