A constitutional law textbook written by Zhang Qianfan, a professor at Peking University known for his advocacy of constitutionalism and judicial reform and one of China's best-known reform-minded legal scholars, has been pulled from book shops. It is the latest text to run afoul of a government campaign against "Western influence." While authorities have not confirmed they ordered the book withdrawn, China's Ministry of Education in early January launched a nationwide check on the content of all university constitutional law textbooks, according to posts on the Jiangxi and Zhejiang province Education Ministry websites. The campaign drew criticism from some legal academics, which was amplified by a rumor that the sweep was sparked by an accusation by a professor that certain texts were "promoting Western thinking and agitating for a Western system". Reuters said Zhang Qianfan's book could not be found on China's main online bookstores. Zhang Qianfan did not respond to a Reuters email seeking comment. Many legal scholars took to social media to voice support for him. Some posted the foreword from his book, in which he stresses the importance of giving people who have suffered injustices the chance to defend themselves using the Constitution. Some voiced concern that some academics might accuse others of failing to toe the party line. Zhang Taisu, an associate professor of law at Yale University in the United States, wrote on Weibo, "The worst part about this incident is that in the current environment, not only are these people not inhibited, but rather they are given a channel, or even rewards."