What strategy did Wu use to make the first-class elders become an outlaw?

Falsely accuse people of rebellion, then rob the court and rob the cottage to become an outlaw.

Chapter 60 of The Water Margin records that Wu Yong pretended to be a fortune teller in order to make Lu Junyi become an outlaw in Liangshan. Lu Junyi was designed to write an anti-Tibet poem by himself. Then Lu Junyi was encouraged to take Coulee to Tai 'an to do business to avoid disaster. On the way, he was captured alive by Zhang Shun in Liangshan. Lu Junyi has been under house arrest in Liangshan for more than two months, making others think that he has become an outlaw. Sung River released Coulee in advance, and Coulee went to Daming House to report that Lu Junyi became an outlaw in Liangshan.

After Lu Junyi returned to China, he was immediately arrested and imprisoned by Liang Zhongshu. Beaten to confession and sentenced to death. Sung River led Liangshan soldiers, three dozen famous houses, rescued Lu Junyi from Liangshan, and Lu Junyi had to become an outlaw.