Is it reliable to recruit security guards at the railway station?

It's reliable and free of charge. Some intermediaries are deceptive, as long as most of them are unreliable. Generally, companies recruit railway security guards by entrusting intermediary companies. Every year, the railway will give some recruitment places to the intermediary companies, and then the intermediary companies will start recruiting. At the same time, the railway will pay the service fee to the intermediary. Relatively speaking, it is more reliable for most intermediary companies to recruit directly, as long as there is no charge.