Dragon King thought the geno plant would still take another forty years to mature, so that meant forty days for Han Sen and his waterdrops. In forty days, he could obtain the items it was going to yield.
He still wasn't sure what the hand or the hammer items were, but Dragon King seemed certain that the knight was a Twin Knight, despite the peculiarity of it being born on this tree.
Han Sen didn't want to leave empty-handed, though. He wanted to wait there until the fruit could mature.
Han Sen moved the underground shelter to a well-hidden place not too far from Thunder Hell Shelter. If they were unable to defend Thunder Hell Shelter, when the not-so-far-away hostiles came to attack, they could retreat to the underground shelter and make a daring escape.
Han Sen left the well and told Water Fairy to keep an eye on it, and make sure no one intruded. He then went to one of the palaces in the shelter to do some reading.