Ⅰ. CHINA BASIC STATISTICAL UNITS YEARBOOK – 2015 is a reference book which reflects conditions of basic statistical units of China by type. The book contains two parts: the first part is comprehensive information of corporate units data by region and sector; and the second part is a general conditions of national corporate enterprises by region, sector, registration status and operation conditions. Ⅱ. The data of 1996 came from the first national general survey of basic units, and the 2001 data was based on the second national basic units general survey, the data of 2004 stems from the firs national economic general survey, and the 2008 data came from the second survey, and 2013 data came from the third one, while other annual information is based on annual statistical reports on basic units.