More than 70 corrupt cadres who fled overseas have been arrested by mainland authorities on graft charges since 1998 as part of a wider national crackdown on corruption, according to a senior prosecutor. Wang Jianming, director of the Supreme People's Procuratorate's Anti-Graft Bureau, said: 'China has effectively curbed the number of corrupt officials who flee the country.' According to Mr Wang, more than 200,000 corrupt officials, including many provincial-level Communist Party cadres, have been dealt with since 2000. He made the remarks yesterday on the second day of the World Jurist Association's biennial congress. Mr Wang said Beijing was preparing to ratify the United Nations' Convention against Corruption, which it signed in December 2003. 'We will try to ratify the treaty as soon as possible,' he said. The country's top prosecution body was preparing for the international anti-corruption treaty to be ratified by the National People's Congress. 'But as many provisions of the UN treaty do not completely conform with the laws in China, it will take some time to make them work together,' Mr Wang said. The main differences between mainland law and the UN accord were on the definition of corruption and what countermeasures should be taken. Mr Wang also said the arrests of corrupt officials who fled the country were evidence of Beijing's effectiveness in rooting out corruption. But he did not say how many officials were still at large. He rejected previous figures in mainland media reports, accusing them of exaggeration by including officials who had left the country but had not been investigated for corruption. The Ministry of Public Security estimates that more than 500 corrupt officials are at large for illegal activities involving more than 70 billion yuan.