Ok, so we agree that "high and dry" means you are left in a difficult situation, like a boat out of water. My first guess is that she is "greeting" the situation. I'm not sure if you've encountered this before, but one other example is "If I ever win the lotto, then it's hello to the good life!" My second (less-likely) guess is illustrating how quickly the situation went from friendly (hello) to unfriendly (high and dry).

in China , it means a high-ranking official or senior officials. hight means high-ranking. in china, it is not "dry", means cadre or leader ,

what is the higt and dry mean, in china, it means the government leader with high position,