How many holding subsidiaries does China Unicom have?

To tell you, there are Unicom Huasheng, Unicom Broadband, Unicom Industrial Communication, Unicom SmithKline, system integration, information navigation, Unicom payment, Zhongrong information service, Zhongxun design, European branch, American branch, Japanese branch, Singapore branch, limited communication construction, Weixin electronic security and so on.