✔ 最佳答案
1. About 300-400 in total. (About half for each company)
2. CTB had its non-A/C buses eliminated before 2002 and NWFB's non-A/C buses (2nd hand from CMB) quitted in 2002 summer. The companies had promised to provide better service for passengers, so kicked away all their non-A/C buses. Therefore there are ONLY A/C buses providing service in winter. Furthermore, A/C buses do have warm air-conditionings in winter, so passengers won't get cold even in winter.