第一次选择中转站时，最重要的是建立测试流程，而不是直接寻找所谓最便宜的服务商。
This article is generated from RelayRank monitoring samples and common relay selection questions to provide a practical decision framework.
What to watch
Start small with monitored candidates such as YunDou, infai, toproutercn, then judge by your own task results.
Do not judge a relay by one metric. Availability, latency, status changes, model coverage, billing rules, and transparency should be read together.
Practical advice
Record model, task duration, error types, latency feel, billing changes, and support response.
Before long-term use, run small real-task tests and keep at least one backup endpoint.