The Communist Party of China Central Committee has published new rules on clean governance and sanctions for those who violate the Party code of conduct.
Previous provisions said buyers were exempt if they did not maltreat abducted children and women or obstruct their rescue.
China's first draft law on domestic violence, currently under deliberation by top legislature, has made various breakthroughs toward bringing the social-cultural taboo under scrutiny of law, according to legal experts.
China's top legislature is considering tougher sentences for assaults on police officers on duty during the bimonthly legislative session that started Monday.
China's top legislature has debated repealing the crime of sex with underage prostitutes and reclassifying it as rape, which would face a tougher punishment.
Victims of domestic violence would be able to apply to courts for protection and the courts would be required to hear such applications, under China's first draft law covering the issue.
China has added the formulation of a civil law code to its five-year legislation plan.
Media briefing on lawyers' rights