Public smoking in China's capital, Beijing, is now banned after the introduction of a new law.
China has over 300 million smokers and more than a million Chinese die from smoking-related illnesses every year.
Smoking bans already existed in China, but have largely failed to crack down on the habit.
These tougher regulations, enforced by thousands of inspectors, ban lighting up in restaurants, offices and on public transport in Beijing.
On the first day of the ban, a hotpot restaurant in Beijing became the first venue to receive an official warning. Inspectors found cigarette butts inside the restaurant, which had also failed to promote a smoking complaint hotline.