Half an hour. Beihai bus. 2 1 is one of the routes of Beihai Gongx * * Automobile Co., Ltd., which was put into operation on 20 15 12 19. Take this bus line to reach: Nanzhu Bus Station, Railway Station, Window of the Ocean, Intersection of New Century Avenue (Yinhaidian, RT Mart), Qiaogang Fengqing Street, International Passenger Port, Rome Square and Yintan. Trains run every half hour, and the line operation time is 07:00-20:30. The line is operated by Beihai Gong xx Automobile Co., Ltd.