Su Xuan had realized early on that these people were all part of the same scheme. Thinking about it, their extortion really was painstakingly executed, starting with the old man's intentional fall, which was the first step of their plan.
The old man didn't fall to the ground to scam drivers with a fake accident. In fact, his real target was a bottle of perfume. This bottle was modified so that a single spray absorbed through the nostrils would simulate drunkenness—even if stopped by traffic police, it could result in a positive breathalyzer test for drunk driving.
The bottle of mineral water had also been switched. It was actually lychee water. Anyone who has driven a car knows that eating three fresh lychees can lead to a positive breathalyzer test for drunk driving, which is quite a nasty trick.
