What if I don't feel any qi sensation — is the practice not working?

No — this is common, and traditional theory actually accounts for it directly. Meridian sensitivity is described as falling into a few broad types, and roughly one in ten people fall into a "slow to respond" category who feel little or no distinct sensation, even with faithful practice.

Sensation is a sign of progress when it appears, but it isn't the only measure of it. Many people in this group still report the same practical benefits — better sleep, steadier energy — over the full course of the program. The instructions are the same either way: stay consistent, and judge progress by how you feel overall, not by a single sensation.