划地为牢

Explanation: According to legend, the ancient times, the circle on the ground, so that the perpetrators stand circle, as a punishment. After the "zoned for the prison" means the limit within a certain range. 　　Source: Ming Wu Cheng-en, "Journey to the West," Fifty-zoned for the prison back to the ancients, he will draw a circle stick, instead of passing zoned for the prison, if there were tigers to Wicked, how can stop him live? " 　　Examples: 'Zhang Fuying this kid will not run? ''He dares. 'Was ~, or price, and fallen in a long neck like South Korea, education was the top sub-Daqing is also trouble. ★ Zhou Libo, "Storm" five-second