China will begin a month-long crackdown on Tencent Holdings Ltd.s popular WeChat messaging application, state media reported on Tuesday, the latest in a series of curbs on online freedom of expression. WeChat, whose Chinese name means micromessage, has quickly become a news source for savvy mobile users in China, where most traditional news sources are heavily censored. Some people are using this platform to disseminate negative or illegal harmful information to the public, seriously damaging the internet system and hurting public interest, causing dissatisfaction among internet users, an unnamed person responsible for the campaign told the state-owned China News Service. Authorities would also seek to weed out domestic and foreign forces seeking to infiltrate and sabotage China, China News Service added.