A Shanghai hospital has opened the city's only clinic to help people quit smoking following calls from international health experts to do more to tackle the problem. Shanghai has opened similar clinics before but closed them because of poor demand. This time the hospital is optimistic about the clinic's future, because of the city's 2 million smokers, media reports say. 'People are more aware of the dangers of smoking, more health conscious and have more money than before,' a hospital official said. The private Shanghai Ruixing Hospital will introduce various therapies combining western and traditional Chinese medicine. A single treatment will take two weeks and cost 600 yuan to 700 yuan. About 60 per cent of men and 3 per cent of women living in Shanghai are smokers, a recent survey by the Shanghai Smoking and Health Association shows. The city has the highest rate of lung cancer in the country, the Shanghai Daily reported. Shanghai is also considering a law banning tobacco sales to minors. A survey by the World Health Organisation and the United Nations Children's Fund found more than 20 per cent of junior secondary school students on the mainland have smoked. A mainland tobacco-control expert has presented research showing the average age at which people first smoke is now 14, compared with 19 in 1997.