Haoxi is a small Beijing-based online marketing agency that helps healthcare companies advertise on Chinese social media and short video platforms. Haoxi plans, produces, and places short video ads for pharmaceutical companies, medical service providers, cosmetic businesses, and similar clients on platforms like Douyin, Toutiao, WeChat, and Weibo. Haoxi offers an end-to-end service — writing scripts, filming videos, managing ad accounts, bidding for inventory, and optimizing post-launch performance — positioning itself as a one-stop shop for healthcare advertisers who lack in-house digital marketing expertise. Haoxi acts as principal in ad placements, buying inventory from media platforms and reselling it to advertisers on a gross basis, earning revenue through CPC and CPT pricing models. Haoxi also receives volume-based rebates from platforms, which reduce cost of services. The business is heavily concentrated on ByteDance's Ocean Engine platform, which accounts for roughly 96-100% of Haoxi's media purchases. Haoxi wins business primarily through referrals from media platforms and returning clients rather than outbound sales. Haoxi's proprietary "Bidding Compass" software aggregates historical ad performance data across China to optimize bidding and placements for clients. Haoxi's growth strategy centers on adding new healthcare advertisers and diversifying onto new platforms, particularly Xiaohongshu, to reduce its near-total dependency on ByteDance.