Hey, do you know the bus company network system crashed?
I heard about it several days ago!
That is unbelievable!
Daddy, can you tell me what they are talking about?
They are talking about the network of the bus company.
Why is their network not working?
Because of the IC cards.
The IC card?
Yes, Beijing is a big city and there are about 7, 000, 000 people using IC cards on buses.
And?
All the people were checking the balance of their cards on the Internet at the same time, that's why the system crashed.
Oh, that is horrible!