(28 Aug 1997) Mandarin/Eng/Nat The Tenth World Conference on Tobacco or Health in China is being hailed as a success on its final day. Experts and anti-tobacco activists from now face the task of applying what they have learned to combat smoking back in their home countries. In China its considered an epidemic. Almost 320 million (m) Chinese smoke -- puffing their way through 240 million packs a day. On the final day of an international anti-smoking conference in Beijing, participants