You can take the K515 bus from Xiaoshan Bus Station to Yan'an Road Station, walk about 150 meters from Dongpo Road Pinghai Road Station, take the 25/K25 bus to Baziqiao (Baochu North Road) and get to Hangzhou Baziqiao;
Or take K515 and get off at Guanxiangkou Station, walk about 100 meters to Yuewang Road (north of Pinghai Road) station, transfer to K16 and get off at Songmuchang Station and walk about 400 meters. Hangzhou Bazi Bridge.