Unit 3 The world meets China理解课文精研读123456cultural and commercial exchangeGansuover a period of 1,000 yearsworldclassUNESCOprotected7the confidence and optimism of peopleAncient Greece,India and Iranthousands of manuscripts,paintings and scrolls including religious storieseveryday lifesilk embroideries89101112131415161718Thank you for watching!19