Police in mainland China have dismantled a coordinated, months-long smear campaign targeting major e-commerce platforms Alibaba Group Holding and JD.com, as Beijing continues to facilitate fair competition and improve the environment for the private sector.Both companies publicly praised the police in Chengdu, capital of China’s southwestern Sichuan province, for “combating online rumours” and “maintaining a clean and healthy online environment”, according to social media posts last week by...