1600 km. From Wuzhou to Changshu, trains, cars and planes have to transfer to Guangzhou. Changshu has no railway station and airport. If you take a train, you have to sit in Shanghai or Suzhou from Guangzhou, and then take a bus to Changshu. The fastest train 16 hours, the slowest train 24 hours. Shanghai is close to Changshu. I wonder if there is a bus to Changshu. If yes, it will take 16 hours. It takes two hours to fly to Shanghai. If you drive by yourself, plus a stopover, it will take about 25 hours. I come from Wuzhou and have been in Jiangsu for four years.