[The black and gray industry chain of some MCN organizations was exposed, and second-hand platforms blocked illegal accounts] On November 13, CCTV reported that MCN organizations had organized a black and gray industry chain of "buying accounts - cleaning manuscripts - brushing up volume", exposing that some MCN organizations colluded with black and gray industries to buy and sell real-name accounts through second-hand platforms. During the investigation, unscrupulous merchants concealed their transactions through trading jargon such as "Guobai" and "Xinmei", and used technical means to further circumvent platform risk control. They also used AI to wash manuscripts and operate account matrices in batches to seize platform traffic revenue and disrupt the online content ecosystem. It is reported that after the program was broadcast, the relevant platforms responded, attaching great importance to the rights and security risks that may be involved in abnormal account circulation, and carrying out regular management of illegal account trading information in accordance with relevant laws, regulations and platform rules. At present, the platform has continuously improved the proactive governance defense line based on identity verification, knowledge graph and AI large model capabilities, and realized a full-process closed loop of "information collection - process intervention - review and disposal": in the information collection stage, through risk lexicon iteration and multi-dimensional keyword screening, it accurately locates variant slang and proactively starts from the source. Intercept illegal releases; in the process intervention stage, in response to some users' attempts to carry out concealed transactions, we relied on large model capabilities to specifically optimize risk identification and real-time blocking strategies; in the review and disposal stage, we continued to carry out review and verification of existing information, and resolutely took measures such as delisting and banning the verified illegal products and accounts. In the future, the platform will continue to improve the prevention and control mechanism, actively cooperate with relevant departments to carry out governance, and jointly safeguard the legitimate rights and interests of users. (CCTV News)