China's CCTV on Monday broadcast an expose on casinos on Jeju Island that attract Chinese gamblers through prostitution.

The broadcaster said 80 percent of gamblers on Jeju are Chinese, often lured with the promise of free tour programs and prostitutes.

One casino contract shown in the CCTV program promised clients purchasing W100,000 worth of chips a free special massage, while around W36 million worth of chips leads to an opportunity to sleep with an aspiring Korean actress or model, and buying W90 million worth of chips two nights with the woman (US$1=W1,150).

Some Korean casino offices in China were raided by police. CCTV said 13 Koreans and 34 Chinese recruiters were arrested in June for illegally luring gamblers in Beijing, Shanghai, Hebei and Jiangsu.

Police also confiscated around W5.5 billion in illegal gambling money. Chinese recruiters get 1.6 percent of the value of chips gamblers buy in Korea and another W36 million if they lose W180 million or more.

An official at the Chinese consulate in Jeju said, "There has been a sharp increase in the number of Chinese tourists who are threatened by loan sharks or having their passports confiscated after borrowing money from operators near casinos."