Many thanks to erveryone's input.I took the advice for resgnation.
I gave my notice to HR yesterday. I felt being released that I would be out of the torture soon, but at the mean time, I have a feeling of being tricked by this job offer. Life is so ridiculous to me now. I just wrappped up erverything for my previous boss and helped her train the new hired a month ago, now it is time for me to look for a job again. I started sending out resumes but do not know when I will get another job? It also will be very embarrassing to ask my previous boss for reference.She wanted me to stay when I notified my leaving. My big concern is what will happen if I can not found a job soon? I have no one to support me.
I made a stupid mistake by accepting this job offer,hope someone here can learn a lesson from my case to think about more before you change job.
Need more blessing and encouragement from this forum.
Thanks.