凿空褥

Explanation: Refers to all sorts of pretexts to extract extortion. 　　Source: Song Yu Wen Bao, "recorded the sword blow," Xue said that Temple was declared counties Zaokong mattress quarter, despite instructions from law clerks, and not like wide-Cheng Chi. "Song Qiuke" Kui Tan Yi recorded for the system "enabling people between real narrow, Zaokong mattress, counties do not phase accommodation, fresh interest from the Governor."