About 24.6 kilometers. According to Baidu map, Four Seasons Hotel of Hangzhou-Zhejiang University City College is about 24.6 kilometers away from Song Cheng, and it takes about 1 hour for 24 minutes by car. The specific route is as follows:

1. At Four Seasons Hotel, walk about 9 10 meters, get on at Gongchenqiao East Station, take Metro Line 5, and get off at Nanxingqiao Station.

2. Transfer to the station and walk about 1 10 meters. Take Metro Line 4 and get off at Shuichengqiao Station (Exit B).

3. Get on the bus at Zhakou Station, take bus No.39 and get off at Songcheng Station, and walk 90 meters to Song Cheng.