48.8 kilometers. According to Baidu map, Zhongshan Daxing is 48.8km away from Tanzhou, and you can take bus 078 and bus 1 10. K 1 1, which takes 2 hours 16 minutes. The specific bus routes are as follows:

1. Walk 280 meters in Daxing, Zhongshan to Xiangjiao Station and take bus 078.

2. Take 8 stops and get off at Zhongshan Bus Terminal, and then transfer to bus k 1 1.

3. Take stop 27 and get off at tanzhou town Government Station.

4. You can walk 450m from tanzhou town Government Station to Tanzhou.