Is the bus route of Sightseeing Bus 2 a Round-Trip route or one-way route? Does it travel from Gongbei (拱北关口) pass by those tourist spot and reach the furthest end (Where will it be ?) and turn back to the depot or Gongbei? Can I just board this bus from Gongbei and then travel on it just to go through the scenic spot of Zhuhai and then alight back at Gongbei.