The story has a number of variants, different people talking to a taxi driver, lift operator etc. The basic point is still valid though.

关于擦鞋男孩的这个故事有若干种不同版本，不同的人是在与出租车司机、电梯操作员等进行交谈时发现股市处于泡沫的，然而，其基本思路都是站得住脚的。

The operator during operation board taxi to the board face, will lead to scrape board face.

操作员在操作时板子滑到板面，会导致板面刮伤。