30 kilometers. If you need to go to Xitangqiao Town, Haiyan County, you can consider starting from Jiaxing South Station, taking a bus or renting a car. Specifically, the common ways to reach Xitangqiao Town from Jiaxing South Station are:

1. Bus: Take the shuttle bus or bus to Haiyan at Jiaxing South Station, and then transfer to the bus or taxi at Xitangqiao Town after arriving at Haiyan County.

2. Taxi/Internet car service: It is relatively expensive but convenient to rent a taxi at Jiaxing South Station or use the Internet car service to go to Xitangqiao Town.