IDC: as the company name refers to the International Data Corporation (International Data Corporation), the world's leading IT, telecommunications industry, and consumer technology market consulting, consultants and activities of professional service providers. Market tracking data in the field of IT has become the industry standard. IDC in 1982, formally established in China branches, is the first to enter the Chinese market, the world's leading market research firm. IDC is of IDG (International Data Group) (International Data Group), a subsidiary. IDG is also the first US-owned venture capital firms to enter China, we often see Shong from IDG China.