The trade secret of China Unicom refers to the information that belongs to China Unicom, has commercial value and is not well known to the public. This information may include technical solutions, research and development results, business plans, market strategies, customer data, etc. Trade secrets are very important to the competitiveness and business development of enterprises, so they need to be protected. According to People's Republic of China (PRC) Trade Secrets Law, the protection of trade secrets includes confidentiality obligation, technical protection measures and contract protection. China Unicom actively takes measures to protect trade secrets, such as strengthening staff training, establishing confidentiality system and restricting information circulation. These measures will help to ensure that trade secrets will not be leaked, and safeguard the commercial interests and competitive advantages of China Unicom.