There's one wall in the lobby on the first floor of each dormitory building that would be filled with all sorts of posters.
Some were for lost and found, some for transferring possessions, and some for selling various goods, and so on.
Wang Ye made those promotional posters to be hung here.
In this way, he wouldn't need to tell everyone that he was selling phone cards. When people passed by on their way back to the dormitory and saw the posters, they would naturally know.
Anyone in need would then call him to buy a card.
It took Wang Ye quite some time to hang the posters in more than a dozen dormitory buildings, from building one to thirteen.
When he finished and returned to his dormitory, he found several people waiting for him.
All were acquaintances, some from his own group and others from Zhou Yuan's group; all were brought here by the same agent.
Zhou Yuan was among them, and they were in the middle of a lively chat.