If cross-betting from Macau on Hong Kong races goes smoothly, more co-operation projects between the two jockey clubs will follow, Macau racing executives say. Cross-betting kicks off on Sunday with the second running of the Hong Kong Macau Trophy. 'If we get $50 million in bets on the first day we'd be quite satisfied,' said Kenneth Liang Kin-man, executive director and chief executive officer of the Macau Jockey Club. 'But we cannot really predict these things because this has never been done before.' Turnover on Macau races was usually around 40 million patacas per meeting, he said. The MJC expects $1-$2 billion in additional revenue per season from the one-way betting arrangement. At this stage, only four bet types will be offered - win, place, quinella and place quinella. Only races organised by the Hong Kong Jockey Club are covered in the agreement, which excludes international races held in Hong Kong. Stop-selling time for each race is two minutes before the declared starting time of that race. 'Currently there are already many Macau fans of Hong Kong runners,' Liang said. 'But now Hong Kong races will become much more appealing to them.' Liang expected interest in betting on Macau races to diminish as a result, but Macau authorities are confident they are on the right track. Said betting director Ronnie Chan Yiu-jok: 'This is just a beginning of a framework of co-operation. This is a good foundation for continuous co-operation in the years to come.'