Nowadays, with the fast development of the market economy, the wider variety of commodities has been offered to people. However, the proliferation of...

Smoking is a bad habit that does harm to smoker and others. Many kinds of diseases and cancers are caused by smoking, such as tracheitis, lung cancer...

It has been estimated that smokers have made up half of the population in China. And the smokers are becoming younger and younger, even ineluding some...