BEIJING, Sept. 29 (Xinhua) -- A book of extracts from Chinese President Xi Jinping's discourses on ecological improvement has been published by the Central Party Literature Press.

The 259 pieces of discourses were extracted from over 80 speeches, instructions, congratulatory letters and other sources dating from Nov. 15, 2012 to Sept. 11, 2017.

The book has seven sections, which include the significance of an ecological progress to the people and the nation's future,environmentally-friendly development modes and lifestyles, and international cooperation for an improved ecology on Earth.

Some of the discourses are being published for the first time.