On November 15, 2017, the Ministry of Industry and Information Technology issued the "Notice on the Use of the 3300-3600MHz and 4800-5000MHz Frequency Bands for the Fifth Generation Mobile Communication System" to determine the 5G intermediate frequency spectrum. On December 21, the first version of 5G NR was officially frozen and released. On June 26, 2018, China Unicom stated that it will conduct 5G commercial trials in 2019. On August 13, the first batch of 5G sites in Beijing was officially launched simultaneously. On December 1, South Korea's three major operators SK, KT and LG U+ simultaneously launched 5G services in some parts of South Korea. On December 10, the Ministry of Industry and Information Technology officially announced that it has issued licenses for the use of medium and low frequency band test frequencies in the 5G system to China Telecom, China Mobile, and China Unicom. On December 20, 5G was elected as the top ten buzzwords in the technology category in 2018. On January 24, 2019, Huawei released the 5G baseband chip Balong5000. On February 18, Shanghai Hongqiao Railway Station officially launched the 5G network construction. And strive to achieve large-scale commercial use of 5G in 2020. The Minister of Industry and Information Technology said that 5G temporary licenses willbe issued in several cities this year, so 5G mobile phones andother related products are expected to be released in the second half of this year.