It is normal for the weight to remain the same in the second stage. If you keep losing weight, acupuncture is not what you call healthy weight loss. You can think of it as a process in which all functions of the body adapt to weight changes, so as not to put too much burden on the heart. Some people don't even lose meat in the second stage, but that doesn't mean that the second stage is not important. Some people stopped at the third stage, and the result was a great rebound. So, I suggest you stick to it, at least three courses.