Does the attendant have to go to a third party to join the company? Why do they have to pay?

Yes, according to the query of China Life Network.

1. The work of the railway station attendant is undertaken by a third-party security company and needs to go to a third party.

2. Rail Group has not entrusted any intermediary agency or individual to carry out recruitment, nor will it charge recruitment and training fees in any name. If it is entrusted by the track group, it will collect the recruitment training fee and pay it to the third party.