At 1 and 1999, China Unicom introduced the earliest GSM mobile phone number segments, including 130 and 13 1.

2. In 2002, China Unicom continued to issue paragraphs 155 and 156, which were also used for GSM services.

3. In 2004, China Unicom introduced paragraph 132, and in the same year, the Ministry of Information Industry arranged paragraphs 150 to 159 and 180 to 189.

4. In 2006, China Unicom added a new network number 166, which was officially launched in 20 17.

5. In 2009, with the issuance of 3G licenses, China Unicom issued 185 and 186 segments of WCDMA 3G services.

In 6.20 13, with the popularization of 4G technology, China Unicom launched the segment 176.

In 7.20 17, China Unicom added a number segment 175 to further serve 4G and 5G services.

8. In 2020, virtual operator 167 was newly approved by the Ministry of Industry and Information Technology, and China Unicom also participated.