The differences are: 7 yuan Shuangxi tar content 1 1mg, nicotine content in flue gas 1.0mg, carbon monoxide content13 mg; 8 yuan's double happiness tar content is 8mg, nicotine content is 0.7mg, and carbon monoxide content is 10mg.

"Shuangxi" brand cigarette is a traditional high-quality product of flue-cured tobacco. Because of its rich aroma and mellow smoke, it is listed as "National Famous Cigarette" and "Shanghai Famous Trademark". Double Happiness cigarettes gradually formed 15mg, 1 1mg and 8mg series products with different tar contents.