敲竹杠 (敲竹槓) qiāo zhú gàng

qiāo zhú gàng phrase to extort by taking advantage of a weakness
Domain: Modern Chinese 现代汉语
Notes: (CC-CEDICT '敲竹槓'; Guoyu '敲竹槓'; Mathews 1931 '敲竹槓', p. 100)