Article 3: The contents of warning words are divided into two groups.

Group 1: Smoking is harmful to health.

Smoking is harmful to your health.

Quitting smoking can reduce the harm to health.

Quitting smoking reduces health risks

Group 2: Smoking is harmful to health.

Smoking is harmful to your health.

Quitting smoking as soon as possible is good for your health.

Quitting smoking early is good for your health.