Sun Yeli, vice director of the Party Literature Research Office under the Central Committee of the Communist Party of China, delivers a speech during the presentation ceremony of the Bulgarian version of Chinese President Xi Jinping's book "The Chinese Dream of the Great Rejuvenation of the Chinese Nation" in Sofia, capital of Bulgaria, Jan 19, 2015. The book consists of 146 expositions from Xi Jinping's more than 50 documents between Nov 15, 2012 and Nov 2, 2013, including his speeches, remarks, letters and instructions. (Xinhua/Wang Xinran)