"In some countries, judges who sometimes don't understand or even have prejudices against China refuse to cooperate," Xu was quoted as saying by the Financial Times.
Xu explained that Western countries refused to sign the extradition treaties due to their "cumbersome" legal procedures and biased judges, as reported by the newspaper. This, in turn, is hampering Beijing's anti-corruption campaign known as Operation Fox Hunt.
In countries like the United States, Canada, the United Kingdom and New Zealand, the legal systems do not oblige authorities to unilaterally honor China's extradition requests, instead doing so on a case-by-case basis.
In exchange for faster extradition processing by the West, Xu was quoted as saying that Beijing was willing to deport fugitives wanted by Western countries on a reciprocity basis.
In November, China managed to bring back 126 financial crime suspects hiding overseas. The United States and Canada also returned officials wanted for high-profile cases involving over $500 million. Some other few hundreds have also been arrested during the preceding months.
To boost extradition efforts, Beijing promised more lenient treatment for fugitives who give themselves in by December 1.