per digit
1.According to time of operation, the buses are divided as follows: numbers that start with "2" are morning and evening rush hour buses, numbers that start with 3 are night buses; according to location, buses are divided as follows: Puxi buses, Pudong buses, buses that cross the river including tunnel and bridge lines, and suburban area buses [700s &900s]; according to payment method, the buses are divided into: single-ticket RMB 1 (lines of 13 kilometer or less from end to end) and RMB 1.5 (lines of 13 kilometers or more from end to end) ticket-sellerless buses (most two digit city buses and three digits buses starting with "1", "2", "7" are of this kind; no change will be made, but terminal stations and hubs will have RMB 1 and RMB 1.5 ticket booklets for sale, 50 non-refundable tickets per booklet), and also single ticket RMB 2 air-conditioned buses and scaled-price ticket special lines (including specialty coach lines starting with "5", Pudong specialty lines starting with "6", mid-size coaches that start with "8", double-decker buses and air-conditioned coaches that start with "9", as well as the ten air-conditioned tourism lines [and airport buses]).
按运营时间分，有：日间公交车、“2”字头的早晚高峰车和“3”字头的夜宵车；按地域范围分，有浦西的、浦东的、过江的（含大桥、隧道线）和郊区线；按票务方式分，有单一票价1元（全程13公里以下的线路）或1.5元（全程超13公里的线路）的无人售票车（市内公交号码为两位数的或三位数中“1”字头、“2”字头、“7”字头的线路绝大多数是无人售票车，自备零钱，不找零，公交终点站、各主要交通枢纽均有1元和1元5角两种面值的公交预售票出售，每本50张，售出不退),还有单一票价2元的空调车和多级票价的专线车（有“5”字头的大巴专线、“6”字头的浦东专线车、“8”字头的中巴专线和“9”字头的双层车或空调大巴，还有十条空调旅游专线）。收藏指正
