This is a fake follower chart because there is only 1 self star supporting without the presence of any resource star. A fake follower chart wants to be weaken further and so all the stars in her chart are positive except for the self star, jia. However, the xu-wei-chou punishment and chou-wu harm gave rise to her problems which I don't intend to discuss here.
The downside of a fake follower chart is that the structure can be broken when meeting with the resource star. In this case, meeting with the water stars can cause the structure to break especially when there is no protruding earth star to control the water stars. So, this chart became vulnerable in the ding-you LP because the bing-xin can transform into water stars with the support of the you rooster earthly branch. If we do not want a negative transformation to occur, we must not activate the earthly branch that supports the transformation. In her case, she activated the you rooster because inside the you rooster is another "boyfriend" star. For those who learnt the ZiPing bazi, you will know that she was still in her ding-you LP in 1997.
A fake follower chart is treated as a strong chart. So, as a general rule, the output fire star is the Useful God. The bing-xin transformation was very bad because not only water stars were formed, but the Useful God, bing also disappeared. In the bing-shen LP, the bing-xin cannot transform because there were 2 bings fighting to combine with the xin.