2. After entering the map, you can see a pipeline in front. On the left side of the pipeline, there will be a big stone. Walking to the position of the big stone, you can see an ancestor next to the big stone.
In the past, you could get kneeling action by interacting with your ancestors. In the game, kneeling is a very useful action, which has an unexpected effect when avoiding the irradiation of Pipi shrimp.