Beijing has launched a renewed campaign to discourage smoking in public. Authorities yesterday warned that undercover officials were conducting secret inspections of libraries, train stations and other facilities in an attempt to catch smokers flouting a city-wide ban on smoking in public places. The city's Patriotic Public Health Committee ordered the special enforcement campaign to help Beijingers 'cultivate a civilised way of life', authorities explained. 'Some are not attaching enough importance to this work,' the Beijing Daily reported. Half of Beijing's adults are smokers, according to state health surveys. The city banned smoking in public buildings last May 15 under threat of a 10 yuan (HK$9.30) fine. Health officials reported 1,100 people were fined under the tobacco ban last year, although smoking in railway stations, department stores and other public places remains common. City work units were urged to 'take their own measures to check smoking', the newspaper said. More than 50 mainland cities, including Shanghai and Tianjin, banned smoking in public buildings last year while China's largest medical schools introduced new regulations forbidding the enrolment of smokers. Premier Li Peng personally banished smoking in the Great Hall of the People last year, exhorting National People's Congress deputies to set an example in healthy lifestyles. The Chinese Government collects more than US$6 billion (HK$46.4 billion) a year in taxes and profits from the state-monopolised sale of tobacco. China, with some of the world's worst air pollution, is planning to issue its first pollution forecasts in key cities. Leaders acknowledge air pollution is getting worse, largely due to the country's heavy dependence on coal. Studies by the World Health Organisation and Chinese environmentalists found air pollution in Chinese cities far exceeded international standards. Weekly reports will be issued in 47 cities by June next year, with the first 10 starting by June 5 this year. The 47 cities include five among the world's 10 worst for air pollution: Beijing, Shanghai, Shenyang, Xian and Guangzhou.