Why does Ningbo 692 train want 6 yuan?

Charge by installments. Ningbo Bus No.692 is a bus line in Ningbo, and the bus company is Dongfang Bus. Bus No.692 in Ningbo takes 6 yuan, No.2, No.4 and No.5 6 yuan because it is charged by sections. The first and last bus of Hengshan Wharf (the first offshore point in Yinzhou) is 05: 10- 17:20, and the first and last bus of Ningbo Railway Station South Square is 05:50- 19:00.