State media are telling Chinese smokers they will no longer be able to light up in most public places including hotels and restaurants after May 1.
However smoking will still be permitted in government offices and other workplaces.
The cutoff date was published on a government website this week and reported in Chinese newspapers Thursday. The ban was originally to have gone into effect in January, but that was postponed because of administrative problems.
Smoking is considered the largest single cause of death in China, killing more than 1 million people a year according to World Health Organization statistics.