**4. Discussion**

Based on the analysis of the current situation of domestic pure electric bus, the road operation test is selected as the test method, the composition and responsibility of the road operation test organization are clarified, the test process with the outline of "determine the test conditions—data Collection—data collection" is determined, and the format of relevant record forms is given. According to the evaluation and the discussions of experts and the opinion of the bus company, on the basis of direct and indirect test data, and through observing Tables 8 and 9, it is evident that V8-1 and V8-2 are equally matched in Group A and that V10-2 is the best choice in all aspects, and V10-1 is considered good choice in Group B.

It was confirmed that the manufacturers who provided the V8-1, V8-2, V10-1and the V10-2 were ready to adjust to the conditions in Nanjing regarding the transition to fully electric bus fleets. As a result, the bus company has purchased a batch of pure electric buses of these brands. They have achieved positive operation effects as of the date of this paper.

Also, it should be noted that some limitations still exist in the current study. First, the selection indicators used are primarily objective. The subjective feelings of the drivers and passengers are not considered in the analysis. Second, the differences in battery attenuation and in other aspects of battery performance are ignored for this paper because they meet national standards. Third, the selection process was performed through observation and expert opinion only. Therefore, using different weighting methods, such as an analytic hierarchy process, is suggested to facilitate the selection of more acceptable and justifiable weighting methods [18] and to make the selection method more scientific. Besides, since the buses being completely new, their future performance is uncertain. It would be useful to analyze the performance of the bus throughout its operation life-cycle.
