What does .pro in the domain name www.runde.pro mean?

It is a domain name suffix, available on Baidu. The .PRO domain name is one of the general top-level domains of the Internet. It was issued in 2002. .PRO has become the image symbol of professionals online. "PRO" is the abbreviation of "professional" (professional), which is aimed at professionals with specific qualifications. Registration of persons and organizations. Early registration is aimed at professional groups, including engineers, lawyers, doctors and other professionals. Registration will be open to everyone from November 15, 2015. As of December 27, 2017, there were 278,423 .PRO*** in stock. The PRO domain name supports domestic administration registration, and the holder can submit it to the access provider for registration and use when building a website.