Detected a vulnerability in Shanghai Metro fare settings
Source: Internet
Author: User
Today, I received a friend's mail and found a vulnerability in the subway operation. The subway company may lose a maximum profit of 66%!
Example:
One from Zhongshan Park to Century Park, and one from Zhangjiang to Jiangsu Road. For example, they both buy two trains.
People's Square met, exchanged tickets, and then went out. OK
Two yuan can be saved, and four yuan can be saved for two people.
Suppose: Jia (Gongfu-> xinzhuang) and Yi (xinzhuang-> gongfu)
Party A and Party B each buy two yuan (lowest) tickets, and make an appointment with a certain station (such as People's Square ).
Continue to ride.
In this way, only two yuan is issued for each person, for a total of 4 yuan; otherwise, six yuan is required for each person, for a total of 12 yuan; thus, 8 yuan can be legally saved.
FT! If two people work in two places, they can save up to eight yuan a day and a meal!
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