Joke Collection Website - Joke collection - I don't know what the joke means when I see it. Who can help me explain?

I don't know what the joke means when I see it. Who can help me explain?

In other words, the person who wants to take the bus is in Beijing and he is going to Harbin. At first, he might want to go by train or plane, but he couldn't get a ticket, so he asked the taxi driver if he could walk to Harbin. Beijing is so far away from Harbin, the taxi driver said that I should do a big maintenance first!

That's what it means. . .