Public comment. Download the public comment app to check the comments of most netizens on cities and attractions, as well as some snacks. Dianping.com was established in Shanghai in April 2003. Public comment is the leading local life information and trading platform in China and the earliest independent third-party consumer comment website in the world. Public comment not only provides users with business information, consumer comments, consumer discounts and other information services, but also provides O2O trading services such as group purchase, restaurant reservation, takeaway and electronic membership card.