Black Cat Complaint is a consumer complaint platform under Sina. According to Sina. Com, the black cat complaint platform is Sina's consumer service platform. Through black cat complaints, consumers can feedback all kinds of problems encountered in the consumption process at any time. With a large number of enterprise libraries and influential experts in various fields, consumers' demands can get rapid feedback and professional guidance, thus establishing a bridge of communication between enterprises and consumers. Consumers can complain through Black Cat official website, Black Cat Complaint Client, iOS and Android versions are online, and Black Cat Complaint applet (WeChat, Alipay, Baidu) initiates a complaint.