3177U is a Chinese web-game platform operated by Tongban Network Technology (Shenzhen) Co., Ltd. It brings browser-based games together with services designed to help players discover titles, join new servers, and access platform benefits. Featured and popular games include Legend of Ba Ye, Dark Archangel, Red Moon Legend: War God Edition, and Shen Jie. Players can browse game pages, view opening schedules, and enter new game servers directly through the platform.

3177U also offers a recharge center, welfare and rewards information, new-player gifts, level rewards, and VIP membership benefits. Some titles are promoted with free first-recharge offers, discounts, or rebate benefits; specific offers vary by game. The site publishes game news, event announcements, server guides, and notices about platform services, and provides customer support and business-contact channels. Its server listings highlight newly opened and upcoming game zones, helping players keep track of launch times. The platform states that its games are unavailable to users under 18 who cannot complete real-name verification, reflecting its stated focus on a healthy online gaming environment.