There are also some very obvious and interesting points to consider as well:
1) if the spy was chinese, why did she have a tibetan name instead? where is her chinese name?
2) nowhere in the article did they say on how they discovered that she is a spy. Perhaps, she got the short end of the stick with her power struggles in the nunnery and was accused as such by her detractors for her to be in trouble? This kind of methods are often used by Tibetan politicians in the past to get rid of their enemies and now, being accused as a chinese spy is a deep insult and also equals to treason.
If China really wanted spies, all they had to do was bribe one or two disgruntled CTA officers (oh, I am sure there are many!) and they will be able to get whatever information that they want about the Dalai Lama and CTA. To be honest, I doubt China could care less about CTA or Dharamsala as they lack the resources to do anything to China. Aside from the Dalai Lama, nobody else from the CTA can talk to China because the minute they make progress, rumors and nasty comments from the Tibetans in CTA come in and wipe away that progress. Seems that CTA does not want their independence at all. Mouth say that they want, but actions show that they could not care less and they just want something to blame for their anger and frustrations.