Tang Shaoyang frowned, not because he did not have the coin but because he had to pay to return to Earth. The System did not mention anything about paying to return. However, the System was not wrong either because he indeed could return anytime. There was no restriction, such as he must finish a quest like the previous floor.
"Make a subordination oath to me, then I will lend you a million coins for you to return. Tell your leader to come at me if you want your faction to be safe in the dimensional tower!" Arnor put his hands on his waist as he looked down at Tang Shaoyang. With their height gap, he had to look down at Tang Shaoyang.
"Thank you for your offer, but I have enough coins to buy the permanent portal," Tang Shaoyang smiled, "I have to check the System Hall first. Goodbye,"