The Chinese semiconductor industry, including IC design and manufacturing, forms a major part of mainland China's IT industry. China's semiconductor industry consists of a wide variety of companies, from integrated device manufacturers to pure-play foundries, fabless semiconductor companies and OSAT companies. Integrated device manufacturers (IDMs) design and manufacture integrated circuits. Pure-play foundries only manufacture devices for other companies, without designing them, while fabless semiconductor companies only design devices. Examples of Chinese IDMs are YMTC and CXMT, examples of Chinese pure-play foundries are SMIC, Hua Hong Semiconductor and Wingtech, examples of Chinese fabless companies are Zhaoxin, HiSilicon and UNISOC, and examples of Chinese OSAT companies are JCET, Hua