All good suggestions

As a backup, prepare documentation.  For example, after talking with her to request more work, send an e-mail to follow up.  So, your request is documented.  You may not like it, but you have every right to do so - as a reminder since she must have very busy schedule.  Do it nicely, so she won''t pick on you.  If you have documentation that can prove this "我向她反映，要求加工作，她表麵答應，卻毫無動靜。而她把所有的TECHNICAL的工作都分給她喜歡的另一個ANALYST", then you are safe.  Or at least she will be more careful in her dealing.
Depending on how much you like to work in this company, either find another group, or find another company.