IN THE middle of August Zhao Shaolin, a retired Communist Party boss of Jiangsu province in eastern China, was carted away by the country's anti-corruption commission. Nothing unusual there. Dozens of local party bosses have fallen foul of a national anti-bribery campaign. What was surprising were the charges levelled against him. These usually stress the vast wealth the accused is said to have squirrelled away by his or her nefarious activities. Mr Zhao's crime, according to Beijing News, a party newspaper, was to flout party discipline by criticising government policies. Some people, Xie Chuntao of the Central Party School sniffed, think "they are cleverer than the Party, which cannot be allowed."

Mr Zhao was not the only one. In mid-October the anti-corruption commission arrested two serving provincial party chiefs, in Hebei near Beijing and Guangxi in the south. Their list of crimes also included criticising the party. On October 12th the Politburo approved a new edition of the party's rules. It was, Xinhua, the state news agency, said, "the most complete and stringent code of conduct" in the history of the Communist Party. It bans party members from making "negative comments" or "irresponsible remarks" about policy. Members may debate issues—but only if they say nice things.