Huyan Zhuo
After being beaten in his military attack on Liangshan Marsh, the imperial general Huyan Zhuo flees to Qingzhou (in present-day Shandong), where he volunteers to wipe out all the local bandits to redeem himself. Concluding that Huyan is a tough opponent, Mount Twin Dragons and two other strongholds in Qingzhou request help from Liangshan. Song Jiang comes to Qingzhou with a force and captures and wins over Huyan. The bandits of Mount Twin Dragons, including Cao Zheng, are absorbed into Liangshan.