According to Baidu map query, you can take bus No.36 from Nanwai Town of Dazhou to Sansheng Palace, walk 190 meters from Nanwai Town, take bus No.36 to Xujiaba Station at Qianjin Port Station, get off at Zhangjiaba Station after 16, and walk 160 meters to your destination. The whole journey is about 7.4 kilometers and takes about 44 minutes.
From the south of Dazhou to Sansheng Palace, you can choose to travel by car, passing through Nanbin Road and Xiaogongmiao Road, and passing through 1 1 traffic lights. The whole journey is about 6.6 kilometers and takes about 20 minutes.