Chief Executive Donald Tsang Yam-kuen and his advisers agree that the administration should be careful to avoid public suspicion over government-business collusion when promoting the 'six key economic areas'. Mr Tsang was quoted by Central Policy Unit head Lau Siu-kai as sounding the caution in a two-hour closed-door meeting of the Commission on Strategic Development. At the meeting, members discussed ways to develop the six 'pillar' industries that the Task Force on Economic Challenges has identified as strengths of Hong Kong, and to seize opportunities presented by a blueprint for Pearl River Delta development issued by Beijing. The six areas are: testing and certification, medical services, innovation technology, cultural and creative industries, environmental industry and educational services. Dermatologist Louis Shih Tai-cho said after the meeting that he had proposed the government consider setting up a body to promote collaboration between the public and private medical sectors. He also suggested the government help private doctors move into the Shenzhen market. Many other members raised the matter of public-private partnership in the areas of education and health care, according to Professor Lau. 'The chief executive pointed out that the government had to be very careful when handling public-private partnerships because there were often doubts about government-business collusion in the community. Some members said projects were often hindered by fear and worries about these accusations,' Professor Lau said. He also said members had unanimously agreed that the government should actively promote the development of the six industries with the opportunities brought by the opening of the Guangdong market.