TODAY'S International Challenge Day has already been underway for several hours. The opening ceremony began last night at 10 o'clock when a 30-minute aerobic demonstration was due to start, followed by a further 30 minutes of aerobics, social, group, nostalgia and disco dancing on the piazza outside the Cultural Centre. A sports-wear and aerobic-wear fashion show, and two dance demonstrations were expected to hold the audience's interest until 11:45 pm, when the chairmen of the Urban Council and Regional Council each welcomed the spectators and participants to the Challenge Day. A torch run, started just after midnight , launched 21 hours of physical activity, in which Hongkong hopes to beat Vancouver, Canada. Members of both councils, sporting and entertainment personalities, members of several Government departments, the Royal Hongkong Regiment, Correctional Services Department, and the Police and Fire Services were due to give Hongkong a good start by running along the Tsim Sha Tsui waterfront. The opening ceremony was expected to end with another dance demonstration. It is now up to Hongkong residents to take part in sufficient numbers to exceed the two million target that the organisers consider is required to surpass Vancouver's total. About 470 recreation and sports programmes will be available throughout the day at suitable locations to attract mass participation. Fitness corners will be set up at various locations throughout the territory, where people can exercise on equipment provided by Fitness Concept. Equipment will include rowing machines, exercise bicycles, ski simulators, step climbers and treadmills. The fitness corners will be at Victoria Park's music kiosk (between 8 am and 11 am) and the football pitch (1 pm to 8 pm); at Cityplaza (10 am to 8 pm); at Statue Square in Central (11 am to 3 pm); and at Southorn Playground, Wan Chai (7 am to 7 pm). Southern district will have fitness corners at Aberdeen Market (10 am to 3 pm), Wah Kwai Community Hall (9 am to 6 pm), and Lei Tung Community Hall (9 am to 6 pm). On the Kowloon side, people can exercise at the Cultural Centre's Plaza (7 am to 5 pm), Kowloon Park arcade (7 am to 8 pm), the MacPherson playground in Mongkok (4:30 pm to 7:30 pm), and at Shamshuipo's Fa Hui soccer pitch in Boundary Street. There will also be a large variety of recreational activities, such as badminton, tennis, squash, tai chi, climbing, swimming, cycling, multi-gym fitness training and aerobics, which will be held at indoor games halls, sports grounds and parks. At some locations, there will even be qualified instructors to give advice and guidance. The elderly, the disabled, and children will be able to take part, too. Sports meetings for the disabled will be held in various districts, including Choi Hung playground. Tele-matches - mini-sports games for the elderly - will be arranged at the Sheung Wan indoor games centre. However, not all exercise has to take place in public, or at a sports ground. Exercise such as press-ups at home, jogging along the pavement, or swimming alone in the pool at the bottom of your apartment block will all count. As well as collecting participation figures from the registration forms already submitted, and today's telephone registrations, staff at various recreational facilities and part-time sports organisers will count the number of participants, including casual players and swimmers and people doing morning exercises in parks and playgrounds. This will ensure that anyone who has not registered is urged to do so. The closing ceremony will take place in Tsuen Wan at the Sha Tsui Road playground, starting at 8:15 pm.