What proof was given, precisely?
The abstract states that "We have recently reported that pretreatment with electroacupuncture (EA) at stomach meridian point 36 (St36) prevents the chronic cold-stress increase in the hypothalamus-pituitary-adrenal axis (HPA), an action that may be under central control."
What is a meridian point? I'm sure the person inserting the needle thinks she or he knows, but I've yet to see a description that would allow someone to locate a meridian point from one person to the next. What does one look like when you autopsy a cadaver? How do you locate one on a live person? A rational person who deals in evidence would be forced to conclude they don't actually exist in reality based on these and other questions that are never answered about "meridians."
So that creates a premise within the cited abstract that has a problem: if a meridian point is not an objectively definable point, where's the replication ability of the study. In fact, I note that that abstract mentions that two groups were used, one with "real acupuncture" and one with sham acupuncture. There was no apparent control group in which the same unknown current was applied at a non-meridian point. If there was an effect, it was more likely that it was due to current being passed through the rat's body -regardless of it's entry point.
The only thing this study is proof of, that I can see, is that humans will go to great lengths to create data that are supportive of their preconceived conclusions.