Hong Kong's message to the organisers in its bid to join the Urban Best Practices Area at the Shanghai Expo must be focused and simple, a top designer says. 'We have to pick an area about environmental protection, education, lifestyle or whatever to showcase how it is a model for Asia,' Hong Kong Design Centre chairman Freeman Lau Siu-hong said. 'There are many theme possibilities,' he said. 'But it has to give a single message so people will have no difficulty understanding and remembering what we are saying.' Chan Wai-kwan, a member of the Tourism Board, thinks Financial Secretary John Tsang Chun-wah should consider the Central escalator-SoHo area, to show off a place where market-driven innovation flourishes. 'The area has potential when it is linked up with Lan Kwai Fong via the Central Police Station,' Mr Chan said. The Wetland Park in Tin Shui Wai, where nature conservation co-exists with development; Ocean Park, which transformed itself into a popular international brand; and the Sai Kung promenade enhancement project were other possibilities. 'I would use the Harbourfront Enhancement's public engagement process, with deliverables like the West Kowloon temporary promenade and Kai Tak planning,' Mr Lau said. Cultural critic Ada Wong Ying-kay said the Central Police Station and Shek Kip Mei creative arts centre revitalisation projects and Kai Tak plans were case studies Mr Tsang could choose from. She said she could not think of any completed project in Hong Kong which would qualify under the competition's selection criteria.