The sample objects of SSE 380 Index are mainly centralized in growing newly-developing blue-chip stocks. When confirming sample space, SSE 380 index, except eliminating SSE 180 index sample stocks, also eliminates companies which undistributed profit is negative and companies which failed to distribute cash dividends or shares in five years. According to the comprehensive rank based on business income growth rate, return on equity, transaction amount and total market value, the number of secondary listed companies in the industry shall be confirmed according to industry matching principle, and the first 380 companies shall be selected as SSE 380 index sample stocks. Such a stock selection method not only comprehensively considers the growth ability, profitability, scale and mobility of stocks, but also highlights industrial status of stocks so as to guarantee the growing potential blue-chip characteristics of index samples.