Obviously, the trip ticket from the Pier No.7 of Saint Herner Harbor to Ice and Snow Wildness was wasted. In order to comply with his promise to Olina, Zhang Tie stayed on Saint Herner Island a few more days.
These days, after encountering the assassination attempt, Olina spent most of her time in Bluesea Castle, so did Zhang Tie. During this period, Zhang Tie only went out one time to buy a shipping ticket leaving Saint Herner Island on August 5th.
The reason that Zhang Tie chose to leave on August 5th was because some powerhouses of the barbarians would arrive at Bluesea Castle on August 4th from Sinaira Island. Sinaira Island was the biggest island in the Ewentra Archipelago. It covered over 180,000 square kilometers. With dense forests, it gathered barbarians and pirates in the sea area in the north of Waii Sub-continent.