Where is China Unicom listed?

China, new york, Hongkong and Shanghai. China Unicom is listed in China, Shanghai, Hongkong and new york, but the listed entities are not the same company. Among them, China, Hong Kong and new york are the same entity, registered in Hong Kong in February 2000, and listed on new york Stock Exchange and HKEx on June 2 1 and June 22, 2000 respectively. China United Network Communications Group Co., Ltd. is mainly engaged in five main businesses: big connection, big computing, big data, big application and big security.