In fact, this bus is the No. 507 bus from Beibei to Shuitu. The actual number of passengers in the bus takes up at most half of the seats.
The reason why this bus still has a market is mainly because it costs 3 yuan per person to take other passenger buses from Beibei to Shuitu, while this bus only costs 1.5 yuan per person, which is half price.
However, this bus does look very old. Why hasn't it been phased out earlier?