合法的。只是有一定的限制,以前没有规定的时候很多私家车也是在参加运营,现在不行了,私家车参加的话那就是违规行为了,可能会受到一定的处罚的。
It is legal. But there are certain restrictions. Before there were no regulations, many private cars also participated in the operation. Now it is no longer allowed. If private cars participate, it is a violation of the rules and may be subject to certain penalties.