Preface：Observation on the General Trend of the Development of Africa ContinentAuthor： Liu Hongwu，Qianjiang Scholar（Chair Professor），General Director of Institute of Africa Studies，Zhejiang Normal University，doctoral supervisor，Vice-Chairman of the Chinese Society of African Studies，member of the Chinese Association of Asian and African Studies，member of the China Association of Middle East Studies，director of the Center for African Studies at Yunnan University. Liu Hongwu was visiting scholar a...