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As an invaluable legacy left by our traditional culture£¬Traditional Chinese Medicine£¨TCM£©is still playing an important role in China's health care system today¡£ In his report to the 17th CPC National Congress£¬President Hu Jin-Tao pointed out that the Chinese government will strongly support the development of Traditional Chinese and ethnic medicines¡£This policy provides us an unprecedented opportunity to carry forward and develop TCM¡£It is now generally recognized that Chinese crude drngs is the major material basis for TCM to prevent and treat diseases£¬and that its quality could largely decide the clinical therapeutic effects¡£As a matter of fact£¬quality control of Chinese crude drngs is now the biggest hurdle for the development and globalization of TCM¡£ Pharmacopoeia of the Peoples Republic of China£¨ChP£©is the legal standard insuring the quality of medications in China¡£TLCAtlas of Chinese crude drngs in Pharmacopoeia of the Peoples Republic of China is one ofthe supplementary books of the ChP¡£This book uses elegant pictures and scientific words to illustrate the TLC identification ofTCM crude drugs recorded in the ChP¡£ The quality of TCM crude drugs could significantly influence the quality of proprietary Chinese medicines£¬and finally influence the safety and therapeutic effects of TCM¡£Thin-Layer Chromatography £¨TLC£©is a rapid£¬direct£¬and informative technology for the identification of TCM crude drugs¡£TLC could reflect their inherent quality and thus can be used for their quality control¡£ Reference drug materials are used in TLC analyses in this book to present the global chromatographic features of Chinese crude drngs£¬so as to insure the authority and applicability of the ChP¡£ I believe that this is unique to the present book¡£ This book is informative with abundant and solid research data¡£ All the crude drug samples used in the studies are newly collected and represent different geographical sources¡£The TLC chromatograms were all original data obtained by the authors£¬and the pictures were taken by high quality digital cameras¡£More importantly£¬this book contributes significantly to supplement and improve the TLC£ºmethods described in the ChP¡£Therefore£¬this atlas is not only a legal standard of TLC identification of TCM crude drugs£¬ but also a useful collection of latest research results in this field¡£I am glad to notice that all the contents in this book are published for the first time¡£ The pictures are highly clear£¬ and the TLC features are easy to be determined¡£I believe that this book will enhance the quality control research and clinical use of Chinese crude drugs£¬ improve TCM development£¬and promote administrative supervision of TCM in China¡£