Not saving you
" Dong Dong! You are here! Oh, thank goodness!" Old man Yu saw the raft that Yu Dong was rowing and immediately felt his heart that was hanging in his throat fall back to its place. Earlier when Yu Dong told him that there would be a flood incoming, he simply ignored it thinking that she was just using them as bait against the Village head.
That was why he didn't agree to his wife's suggestion to go with Yu Dong and threw a tantrum. Because he was worried that his wife and granddaughter will sneak out of the house, he even locked the doors and windows making sure that no one would be able to go out of the house, while he was doing all this he didn't forget to suck up to He Cheung, he complained about how Yu Dong came to find trouble with them and that he was absolutely disgusted by her antics of making trouble in the village.