Why didn't the Shandong version of Water Margin have a happy ending?

The Shandong version of Water Margin is not a complete shot, but several independent stories based on the stories of several central figures. The first thing I saw was that Song Wu only saw "Bloody Mandarin Duck House". It is said that there was a plot of Song Wu walking on centipede ridge at night, but at that time, he only saw the preview of centipede ridge, and there was no following. Then there are Lu, jy, and the outline of intelligence and birth. Now it seems that several stories are connected together, so there is no ending.