There were four keyholes on the main door of Warehouse No. 7.
Only when the four keys were gathered together could the main door of the warehouse be opened.
William Cole received the keys from Vermilion Bird and others and then opened the large door of the warehouse.
The first door was opened, and behind it was another metal door.
Vermilion Bird, Green Dragon, White Tiger, and Black Tortoise stepped forward simultaneously, each inputting a different password to open the door.
William Cole expressed curiosity, "Isn't this a bit too troublesome?"
"If I want to come to Warehouse No. 7 in the future, wouldn't it require all four of you to be present?"
"No, that won't be necessary," Vermilion Bird explained with a smile, "This is to prevent the inheritance of Warehouse No. 7 from being lost. Each of us holds a password, and only by combining the four passwords can the main door of Warehouse No. 7 be opened."
"Moreover, the password of the previous Patriarch will be reset."