A $1 billion pay day could be in store after Hong Kong won a prestigious international convention - the largest staged here - it was announced yesterday. About 25,000 delegates are expected to attend the Lions Clubs International Convention in 2005, with Hong Kong beating strong bids from Sydney and New Orleans to host the event. Though the conference is rarely held outside the United States, it will be a return trip for the Lions, who also met here in 1992. The Hong Kong Tourist Association estimates receipts could top $1 billion with visitors from 185 countries and districts. The association backed the bid to hold the event with support from the Government, hoteliers, chambers of commerce and other travel bodies. Tung Chee-hwa pledged last night the event would have the support of the Government and community. 'We . . . will work together to make the event an unqualified success,' said Mr Tung, who made a video appeal as part of Hong Kong's bid. The five-day event will be held at the Hong Kong Convention and Exhibition Centre from June 27 to coincide with the eighth anniversary of the handover.