China has published a list of stringent anti-corruption rules for public officials ahead of a reshuffle of provincial posts later this month.
Mr Hu has warned that corruption threatens the party's survival
Called the "10 taboos", the list bans bribery, lobbying for promotion and using dirty tricks to harm rivals.
Providing or accepting souvenirs or hospitality linked to employment were also out, Xinhua news agency reported.
Corruption is widespread in China, with access to prized employment and education often dependent on bribes.
The list was made public ahead of reshuffles to provincial legislatures and advisory bodies later this month, as many officials come to the end of five-year terms, Xinhua news agency reported.
Under the new rules, officials may not distribute "cash, gifts or stocks to buy government jobs" or hold social activities aimed at forming cliques.
Using "letters, leaflets, text messages or the Internet to vilify others" was also banned, as was the use of intimidation towards delegates or committee members.
Twenty inspection groups would be sent across the country to monitor the reshuffle, Xinhua said.
China's all-pervasive corruption is seen as a major source of social discontent.
In October, at the opening of the Chinese Communist Party's five-yearly congress, President Hu Jintao warned that the party's "very survival" depended on reducing and punishing graft.
Several high-profile officials and individuals have been sacked or jailed in recent months as the government works to show it is serious about addressing the problem.