A young man is lying in hospital sadly. The 24-year-old lost his right leg. The doctor said that his long history of smoking was the reason. "I first smoked when I was 14. _ made me feel like a man and I thought it looked cool. Now I know I was wrong," said the young man. It is a mistake many young people make. According to the survey, 40 million of China's 130 million young people aged between 13 and 18 smoke. Fifteen million of them are addicted  . The survey also found that about 68% of young smokers first smoked before the age of 13. Many young people see people smoke in the movies, but in real life, stars like Jackie Chan think smoking is a bad thing and not cool at all. Doctors say that if a person starts smoking very young, he or she may live 22 years less than those who don't smoke. The number of young people who smoke in China is   _   million.
15 40 68 130