Jin Jingmei, Wang Yanhong, Hezling Lin, and Yang Ping Lin Wang Yanhong will stand trial before Magistrate Tracey Ganaii on Thursday.
They made a brief appearance before her today (August 13) to confirm a set date for the trial.
Jin Jingmei and Wang Yanhong were both charged with aiding a person to remain in the country without a valid visa and entry permit.
The other two appeared on charges of entering and remaining in the country without valid visa.
All are alleged to have been brought into the country on tourist visas and are now engaged in business activities in Port Moresby.