His last words were for these shipbuilders to hear. In the past, whenever there was something precious or a secret, the king would do anything because he wanted to monopolize, kill people and kill people. Wang Zu was afraid of these workers after the excitement was over, worried about Wang Zu because he wanted to keep a secret and would kill them later, he might not have worked hard at that time, so he said this sentence, meaning Now it's necessary to keep it a secret, once these new ships are used, they will not be known to the whole world, then there is no need to keep any secrets, their lives will not be threatened, and their caught up on some new boat building techniques. Wang Zu uses this trick to reassure people.