4399 is the leading online casual game platform in China. Since its establishment, 4399 has adhered to the user-oriented and "user experience" as the core mode of website construction. Free to provide users with a variety of green, safe and healthy games, and constantly improve the service strategy, won many loyal users. The platform has always adhered to the "user experience" as the core mode, providing users with all kinds of games that are green, safe and healthy and suitable for all ages for free, and constantly improving the service strategy.