China's first television mega-screen is about to make its official debut in Shenzhen and its Hongkong developers are predicting an advertising revenue bonanza. THE first outdoor television mega-screen in China is nearing the end of a month's trial, and will be fully operational in less than two weeks. The 107-square-metre screen is opposite the main entrance to Shenzhen railway station. Joint developers Hoi Yun Trading and Investment Co, Hongkong Wang Cheung Co and Shenzhen Sheung Pao have invested $20 million in the project. There are plans for similar mega-screens in Shanghai and Beijing. The company awarded the sole advertising agency rights, Hongkong 01, said the amount of people passing through the area was huge. Mr Lam Sun-kuen, a director of Hongkong 01, said: ''Advertising packages range from $30,000 to $150,000 per month, with a choice of different spot lengths from 10 seconds to 30 seconds. ''Broadcast hours are from 8 am to 3 pm, and from 5 pm to 10.30 pm,'' he added. Selecting a specific time slot will cost an additional 50 per cent. Two categories of product are on the advertising rate card with ''liquor and cigarette products'', attracting premium rates. ''Normal Products'' is the other category. ''Advertisers in the free-trial period have included Martell, Remy VSOP and Club cognacs, together with M & M chocolates and Goldlion fashion goods,'' said Mr Lam. A typical 60-minute schedule will include community, local and international news, financial and weather reports, music videos, karaoke, a travelogue, cartoons, sports highlights and a documentary together with the advertisements. The editing is carried out in Hongkong and tapes sent to Shenzhen. Beneath the screen is a mini-television studio staffed by technicians, engineers, a supervisor and a producer who can mix live television feeds into the programming at any time. The screen is 13.08 m long and 8.19 m high, and has high-definition television-standard images, clearly visible from a distance. The system currently has speakers alongside the screen, but sound will eventually be via a network of 90 mini-speakers, built into the area along pedestrian walkways. The mega-screen system is manufactured by Central China Displays Laboratories (CCDL) in Zhengzhou, the same company that recently announced it was bidding to provide the stadium video services for the 1996 Olympic Games in Atlanta.